:wave: If you can find a good vet with a experience of neutering rabbits thats a start and they will advise you however, I'm not sure what you mean by her 'messing' around the house, it's quite easy to litter train your rabbit but I'm not sure if thats affected by hormones so you'd be able to do that with an unspayed rabbit or a spayed rabbit.
What you need to ensure is that she gets given pain relief and some to come home with, I notice your in Romania, we have a pain reliever called Metacam which isn't actually licensed for rabbits but works and probably will be soon.
She'll need lots of rest and a soft area to lie on (eg vet bed/towels) preferably with a heat pad near her but don't put her on it, you'll need to restrict her movements for at least 24-48hours minimum in the sense that she shouldn't jump around, she'll not want to anyway for about 24 hours at least, ask them to do internal sutures, that helps and I found both my girls did lick their wound a little (which is natural) but if you see them biting or nibbling then discourage gently, and you do need to check it regularly for infection, any redness/swelling, hot or seeping fluid is bad.
Avoid handling and provide a selection of all her favourite foods, hay to eat and boiled tepid water in a bowl is essential, it's best to provide an area to toilet in maybe use newspaper or puppy training pads are absorbent with hay in a basket or rack rather than in the litter tray, you need to be careful for about 48 hours that the hay doesn't get into the wound but she must have it to eat from a bowl or basket.
Your priority is to get her drinking and eating, they should make sure she's had pain relief, and fluids really if she is going under GA. She will need a nice cosy comfy area to recover with all she needs and very gentle handling for a while - it's a major operation and you must be careful with the way you inspect the wound, ideally get on the floor and try to look under your rabbit rather than tipping her backwards for the first couple of days, actually using your hand gently to just hold it on the wound you can guage the temperature and if it's dry etc
Best of luck, it's pretty straightforward routine here for our vets, hope you can find a good one over there.:wave: