Kitten advice needed

That's a super cute cat, nice job giving it a home! Males can be neutered sooner than females can be spayed, but either way you can wrap that up before she has a first litter. Cat box training is super simple as noted above - just put them in the box a bunch of times, they will figure it out. I use the lightweight clumping litter and only have to scoop out the nuggets and top it off as needed. I've rarely done wet food, all my cats got dry stuff in a gravity feeder so they could graze as desired. You will need to keep it on kitten food for 6-9 months or more, your vet can advise on that. Keep LOTS of designated scratching items handy. I rubbed them with catnip to make sure the kitten wanted to use it. When I found mine scratching something not on the approved list, I'd pick it up and put it on the scratcher nearby. Toys are essential to keep the little bugger busy. They are curious and will get into everything. And I do mean EVERYTHING. I had some active toys I could leave where the kitten could play with it even if I was gone. A cat tree with lots of shelves, cubbyholes, and so forth is an excellent investment, and the taller the better. Cats like to be up high looking down on things. I would not declaw it but rather teach it what to claw or not. If it gets outside it will be defenseless with no claws. As far as indoor/outdoor goes, it depends on where you live. At my house coyotes and bobcats are a real deal, claiming any cat left out too long. In a more urban setting maybe not so much, but it's a risk you take if it goes outside.

Good luck on your adventure. You won't be sorry - there's nothing like a happy kitten snoozing on your lap to make the world a better place.