Hey there and welcome to Deviantart!! I hope you have a great time here.
------------------------------------------ Assuming this is your first account here, I'd like to offer a few helpful suggestions-
If you feel a bit lost, don't worry! Try checking out the Frequently Asked Questions. (you can also contact the help desk there, if you can't find your question).
- Simliarly, check out #Help (the help chat) to get help from a real person.
If you have a little extra time, come introduce yourself at the Welcome Center forum.
As for promoting your work, it can be tough with so many other artists out there... I'd suggest taking a look at A New Artist's Guide to dA. (I know it's quite a bit to read, but it can really help get you noticed here)
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Hopefully this helps you out a bit!
If you have any other questions, don't hesitate to ask! All you need to do is click the "Reply" button on the bottom corner of this comment.
Here's a balloon to get you started:
(you can reply back to this message if you want, but you don't need to ^^)