Can anyone come in and draw or is there only specific people who can

There is no specific passes or qualifications, it is a fun and interactive opportunity to learn from an actual Disney artist. Of course you will be doing the art with your own hands, so results will vary with respect to your existing experience in art. But even the most beginner will have something resembling the character at the end. All the seats are excellent for viewing.

Literally anyone. I would look at the schedule to try and find a character you like.

Open to all visitors

Anyone can so long as you have valid park admission for that day.

Only limit is the size of the theaters. (Limited amount of seats) anyone can draw. It's fun to learn

Any and all my kids loved it

Anyone can come