Hello how old is your dd? My dd had her tonsills and adenoids out when she was nearly 5yo.
My advice is be well stocked up on pain killers, my dd isn't the bravest soul bless her and was in a lot of pain afterwards and for a good week post op.
Get lots of 'soft' foods that your dd will like, for example skips, marshmellows, yogurt, ice cream. The consultant said afterwards make sure she eats - let her eat anything she wants to!!!! It helps prevent infection.
I bought my dd a 'hospital' present, she got one of those kiddicamera things which worked out great as kept her occupied pre and post op.
Dd stayed in overnight - not a comfortable night for either of us!!!
Dd had to keep a cannula in overnight and went ballistic when they came to take it out
maybe without scaring your dd warn her about the possibility of having a needle in her hand.
My dd took nearly 2 weeks to get back to what I would say was normal, she was very low for quite a few days post op and I wasn't really prepared for that. In hindsight I wish I had been more patient with her as she was clearly slightly traumatised by the whole experience
We were advised to keep her off school for at least 2 weeks due to risk of infection.
Hope I am not scaring you but wish I had been more prepared iyswim?!!
Good luck 