Best Tablet for a Complete Beginner?

I'm looking to get into digital art because I think being able to erase and change layer and whatnot will help me progress faster.

My budget is like $200, but I can save for a while and go a bit higher if need be. I'd like to be able to bring it to work so I can draw on my lunch break, so it would have to be completely functional without being hooked up to a computer (if that's a thing). I'd prefer the screen be on the tablet. I have a PC for anything I'd need it for.

Also, any recommendations for software would be nice. I've heard of Krita but otherwise I don't even know where to start with this stuff.

Thanks in advance!