Do they meow a lot? Some do and some don't

and are they easy to litter train? most are litter box trained by the time they leave their mom.

It will be living in my room with a litter box, scratching post, etc., is that okay? That should be fine, but don't be surprised if the cat constantly tries to escape.

Or do they need to go outside and explore the house? They should stay inside the house. And even though they don't need to have run of the house, they might prefer that.

If you need to confine the cat to one room absolutely do NOT get a kitten! She would go stir crazy in a small space. Find an older, calm kitty who would enjoy simple things, like sleeping in a sunny spot, and a good petting session with "mom".