Completely know how you feel. I was almost sick from worrying about what was going to happen, when my Summer got spayed.
The best time to get them fixed is 6 months to 1 year. But because I was so nervous, I put it off until she was 3. Stupid idea
I applaud you for getting it scheduled and not putting it off
First, definitely make sure you come home with pain medication for her. If they don’t have pain medication, it will take longer for them to eat. You want them to eat and poop as soon as possible. Although, there’s no need to worry unless she goes over 24 hours.
Try not to fuss over her, though I know how hard that will be. And keep her warm, even if it is warm outside. When I let Summer out of her carrier, she ran and sat in her litter pan (which I made sure was clean prier.) It was in the summer time, but her ears were cold to the touch, and in need of warmth. Then, almost exactly 24 hours after surgery, she suddenly woke up and acted normal.
As for the not jumping and such, my vet had told me to keep her in her cage for 7 days. I have to admit, I didn’t follow that.
I let her move around the house freely like normal. I mean, they know what hurts and what doesn’t, right? What I DID do was block off the upper level of her condo with cardboard, so she couldn’t jump up there and pull her stitches.
Was she mad? heck yes. But it was for her own good. haha.
Maybe buy some stepping stairs to put next to the bed/the cage, so she can walk up them instead of jumping? or if you think she’ll ignore those, for the bed, just block the side off with an x-pen, or a homemade one with NIC cubes and zip ties 
As long as you have a good rabbit savvy vet doing the procedure, she should be fine!