We used a lot of grain-free canned -- it tends to be more expensive, but it seemed to be better for them than cheaper brands w/lots of grain-y filler -- but also raw food, like ground-up rabbit/chicken/etc. (they need the bones nutritionally for... calcium? (I think? It's been a long time since I looked up this stuff ^^;;), & some cats are fed raw w/whole pieces -- like, toss down a chicken wing or whatever -- & they eat the bones, but that didn't work for ours; even little things like... ahhh I can't remember what kind of bone-y tidbit, maybe chicken necks or something?! -- one of our kitties got a bone stuck while swallowing for a bit, which was scary ;__; ) I think some people do raw food w/supermarket meat & then just add in bone powder to replace that -- might be a bit cheaper (we ended up ordering raw food from farmers who produce it specially for ppl feeding raw). Tho w/raw, sometimes kitties can be a bit constipated, esp. if they've been fed stuff like grains for a lot of their lives, so we put in stuff like psyllium fiber or slippery elm in their food to try & mitigate that. There's a lot of info on raw feeding here, tho I think as w/anything, there are... differences of opinion among raw feeders regarding some of the details, haha.

This book talks about different models of feeding, including raw food, & is by a vet (who used to work for one of the big junky pet food companies -- I think Purina?), so I felt like it was pretty reliable for a lot of health pointers.

Ahhhhh sorry this is a bit disjointed, am writing this sneakily during work. :) But yay kitty! Good luck! & also once you get the cat, if you want some lolz/a way to help keep kitty destressed/amused/bonding w/you, maybe try clicker training? Our kitties could do things like give us high-fives or jump over an outstretched arm (& we also trained them to give us nose kisses!!!!), & I know ppl who are more dedicated to it than we were could get their cats to do a lot more. :D