As you have not found any groups yet to join, I would suggest checking out: groups.deviantart.com/ It will give you a lot more exposure especially once you start posting more deviations to your page! Feel free to check out other people's profiles, comment on or favorite their artwork, or even add them to your watch list!
Also, feel to join the ThumbHub chatroom to meet other artists/deviants and get acquainted with this awesome site!
I hope you enjoy your stay here on dA! Kitteh-Pawz