Every rescue has their own requirements, if you want to adopt from Rescue Y... So for example Rescue X might approve of your 6ft hutch where as Rescue Y might not and would prefer a 7ft one. As you're going to adopt from Rescue Y there's no point contacting Rescue X to do a home check for another Rescue.
Go to each of the rescue's websites, choose a bunny you'd like. Or choose the nearest rescue and let them speed date your bunny with their rescue buns to see who'd better suit to your bunny's personality.
Then contact them saying you'd like to adopt a bun. They'll home check, if you pass they'll let you adopt. If you fail, see what you can do to pass and when you've improved, contact the rescue and they'll home check again.