I'm thinking of doing commission since I'm in need of some money for my dad's medical and care expenses but I have no idea what's the standard procedure of doing a commission on DA. Thus I need some suggestions from you guys.

For someone like me who doesn't have impressive artistic skill (who only knows doing manga style most of the time), what is the standard charge price commonly done by average-skilled artists on DA? Do you get payment first or later when doing commision?

And for digital artwork, do you send in original resolution of the file to the purchaser? Is it considered illegal to do commission art of copyrighted characters (since money is involved in doing commission)?

Any advice would be great! Thanks!