I clicker trained my old bunny Neo, so it definitely can work. It requires patience, timing, and something really tasty in tiny pieces that are quick to eat (I used ordinary food pellets because Neo loved them).
You can use a clicky biro instead of getting a proper clicker, as long as it makes a repeatable identical noise that isn't so loud it frightens the bunny.
Stage 1 - Charging the clicker
What you need to do is "charge" the clicker before you do anything else - this is how you get the rabbit to associate the click with the treat. Offer little pieces and click as she takes each one. After a lot of repetitions she'll get the idea that click means treat - you'll know she understands because she'll start to look for the treat when she hears the click. Every time you click she should get a treat.
Stage 2 - mark and reward the behaviour
Stage two is when you start to reward the behaviour you want to see. Start small - you can't expect her to jump through a hoop or do any other complicated/difficult trick without working up to that. Sitting up in the periscope position or touching your hand are good behaviours to start with as they are natural for bunnies and aren't too difficult. Pick one behaviour, don't confuse her by trying to teach different things at once.
There are two ways you can approach reinforcing the desired behaviour - you can wait for the rabbit to do the action on its own, or you can "lure" it (for example holding a treat just above the rabbit's head so they have to lift their front feet slightly to reach it if you're teaching "sit up"). Click at the exact moment she does what you want, and treat immediately after the click. Timing's massively important, the click and treat have to be very close to the behaviour so she can associate the behaviour with the click+treat. Always treat after a click even if you clicked "wrong". And don't try to use any commands - she has no idea what "sit up" or "touch" or whatever means right now so it's a waste of time. Keep quiet. And resist giving treats without clicking just because she's cute! She'll work better if you're only rewarding the specific behaviour.
What you're teaching her is "if you do this thing, you will be rewarded". That's all. After a while she'll start to increase the frequency of the desired behaviour - I find that this happens quite suddenly as if a switch has flipped on in their head and they've realised all at once that sitting up (or whatever you're teaching) means food. Once this happens reliably, for example she performs the behaviour again straight away after finishing each treat, you're ready to move on.
Stage 3 - Teaching the cue
Next it's time to add the command. I think this is the hardest stage, personally, because it's much harder to get the timing perfect. Pick a short word/phrase like "up" or "touch" or "jump", whatever works, as a cue. You'll give the cue just before you click, so as she's most of the way through lifting her feet for the sit up, or just before her nose reaches your hand for the touch. This whole stage only works if the rabbit's really happy and reliable about the behaviour - it's useless if you say "touch" and she pulls away for example, because then she learns that "touch" means "move away" - so back up to the previous stage if you need to, make sure the behaviour is really solid.
Stage 4 - Using the cue
Now you can start to use the cue as an actual command, saying it before she performs the behaviour. If you've done the previous steps throughly then she'll respond to the command and perform the behaviour. Say it ONCE. "Sit", not "Sit, sit, sit. Sit!" If she doesn't respond correctly 90-95% of the time, she's not ready for this yet and you need to go back to stage 3. It's no good keep cueing if she isn't doing what you ask for, because then she's starting to disassociate the word from the action and undoing your previous good work.
But hopefully by now she'll perform the action quickly in response to the cue. Keep clicking and treating - if she's working for you she should get paid! If you're happy, you can move on to something else (keep practicing this one too though), or you can start to refine the behaviour.
Stage 5 (optional) - Shaping
So bunny's now sitting up every time you ask (or most of the time). Great! It's likely just a little foot lift right now, so we can improve that, right? Pick one thing to change, such as duration, or height. Don't try to modify in two directions at once. And you might want to drop the cue during this stage too (add it in again afterwards) so this stage is basically like stage 2 except you're making the rabbit work a bit harder. Try it, see what happens.
So now basically you're being a little more discerning with your clicks. Say you want a longer "sit up" - make the bunny wait a fraction of a second longer before you click. If the rabbit gives up too soon, you're moving too fast. Click and treat every time she stays in the sit up position for a tiny bit longer than she did at first. Once she's doing a longer sit up reliably, increase the time a fraction more. You're aiming to very gradually shape the behaviour to make it better.
Similarly if you want the "sit up" to be higher, you'll only reward slightly higher feet lifts, ignoring the lower ones.
This stage can be a little frustrating for the rabbit if you move too fast. She's used to getting a treat every time, and it can be hard for her to understand that now you want something slightly more. But she'll get it if you go slowly.
The "touch" behaviour is a very useful one to shape. Touching your hand with her nose is adorable, but shaping it can lead to coming to you from across the room, or jumping into your lap, or leaving that dangerous object alone. If you teach her to touch something like a ping pong ball on the end of a chopstick (use a different command for this if you want a hand touch as well - I suggest "target"), you can shape the touch into a follow. This is great for leading them into a carrier or back into the cage, or even on top of boxes or over a stick to teach the "jump" command.
Train in short sessions, maybe 10 minutes two or three times a day in a distraction-free environment. End on a good note with a good behaviour earning a "jackpot" treat of everything you have left (make sure to save some for this) and if she isn't feeling like training right now then respect her and try again later.
Okay, this is an essay. Apologies! I'm just very interested in animal training and psychology and I've learned a bit about it. Good luck!