Welcome to Gaia! ::

Honestly, I'd say it should be around at least 4k. I gotta say that your anatomy needs a bit of work though.

i taught myself how to draw as well. my suggestion is find other people's work and try drawing that. i also found that da vinci's vitruvian man is a great tool for proportion of human anatomy. i know your works won't be perfect, but it helped me with anatomy.

now, for prices, i'd give away avi art and whatnot for the first week that you have your shop open, then once word of mouth gets out, i'd start charging a small amount. once demand goes up, then raise your prices accordingly. the most important thing is to listen to people in the threads on your shop. if you get a lot of posts saying your prices are too high, then maybe they are.