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)
* 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)
Hopefully this helps you out a bit!
Here's a balloon to get you started:
(you can reply back to this message if you want, but you don't need to ^^)