Hey, I like how you use the full page for your drawings! That's a critical thing that a lot of people forget to do.
To create an art shop you will want to head over to the
Art Shops forum and create a thread there. Make sure to post your samples and either post an asking price or request that people make an offer for you. You can also create a thread in
Art Freebies and draw some avis to fill out your sample portfolio! Yeah! Do it up!