Have a great time on devintART, I cannot wait to see the amazing artwork you will submit! However, please make sure what you submit is within the copyright rules and doesn't infronge other rights regarding use of art by reading this:
FAQ #8: What are violations of the deviantART copyright policy?
FAQ #306: Does "Crediting" let me use whatever I want?
FAQ #32: Fair Use and Your Submission
Please be mindful of other deviants on the site, and remember that you can post has limitations as well:
FAQ #3: Are there restrictions to comments?