Becoming an artist is much too complex to simply give a list of online links and hope that you will succeed as an artist. However, I will offer some of the best here. If you know of links that are outstanding, please contact me and I will be happy to add them:

On Being an Artist:

Licensing your art:

http://artlicensingblog.com

Online Art Galleries/Co-ops, etc. where you can sell your art: