Know its a big age gap but my DD in the summer hols (age 7) was admitted unexpectedly. Had had not previous experience.
She was admitted at 12pm but op not done til 9pm. In that time the "play team" on the ward brought her a tv and games player. They took her off and did crafts and had a pretend party with her and some bears and dolls and we wondered about alot.
Hopefully you will have a play team too and they will be a godsend to you. I know there is a big age diff but thats what they are there for.
The playteam talked thru the forthcoming events with a simple picture book with DD and I.
As for the going under with the ga, my DD freaked at the last mo (la cream had been applied to the front of both hands with clear tape over, ready for the canular to be put in, in the anaesthetic room) They put the ga in straight away while I was holding her sitting up. She went to sleep immediately and yes its bloody awful but that was it done.
I would advise you take bits for you to nibble on. I did not eat in front of my DD and in fact when my DH let me wonder off for 5 mins I did not have the heart to do it secretively either. Have his favourite snack bits ready for when he can eat. A very kind auxilliary got us two cardboard sanwiches, and on any normal day they would have gone in the bin, but we were so grateful. I would imagine he will be allowed to eat once he has proven he can keep liquids down and does not have any adverse reaction to the anaesthetic.
If I have missed something I may be able to answer pls ask. Oh yes, take a spare tampax/pantyliner, the shock and emotion of the days events made me come on and I had to use a maternity pad coz the shop was shut.............. lovely eh ?
Take your favourite tea bags/coffee/book/credit on your mobile/change for the phone/favourite bed time bear so he/she can have a name tape put on too !
Blah blah blah...... thats the end of this brain fart for now !
He and you will be fine. If your not sure about something, ASK until you are.
Best Wishes