Quite like the person next to me already just splendidly said; "Welcome to the community!"
I got "asked" to help welcome some few new deviants to here so here's few things I'll share with you:
While there is no right or wrong way to use DeviantArt (well, I bet there are some rules stating a wrong way...) I can't say for real what exactly you should do if you would happen to want to increase your exposure or make new friends, but I'm sure just you being you helps
Get a nice lil' introduction up on your deviantID so people will know what to expect of you and some magic might just happen, or not...
Also try poking your nose around in few different groups to find some that you feel suit you, sharing your art with them is a sure way to get people to pay some attention to that tiny existence called "you"