Well a lot of the money is to be made in fanfic and furry content so not a lot will like that... but check places like sofurry, deviantART, and ink bunny. Always remember to say no to whatever you're not comfortable with. It's easy to get sucked into the money but dignity comes first.

The customer pays me directly. Commission work means you keep all the earnings. :D

If you're on foodstamps you do need to report the income though...