If you don’t have the five free Galakrond’s yet, obtaining them should be the first priority. You can do this by opening one pack of Descent of Dragons. The Warlock one can be pretty powerful.
I’d also recommend hitting up a thread in the new player tavern of this forum posted by Jonius called New Player Beginner Decks. It’s got a couple of reasonable Budget Aggro decks, including a Mage deck.
And, if you’re interested in having someone check out your games, I’d be happy to watch along. My tag is Sprocket#2110