Deposit your money in Poker Stars. Play the .05/.1 nl tables until you build a bankroll of $150. Players at this level are very loose. Overbet pots to make them fold when you have big cards and camp out until you get monsters and try to lure them in but don't slow play unless you know what your doing. If you have the patience and you are cautious person then build your bankroll to $250 before you move up to the $25 buyin. If you don’t have the patience then start playing the $25 games but make sure you go back to the .05/.1 games if your roll drops to $100.

When you reach $250 you have a choice of continuing to build at stars or you can move to Party poker. The games are easier at Party Poker but if you wait until your bankroll reaches 500 then you can collect the full bonus at Party.

P.S. In reality 50 dollars isnt even a big enough bankroll for the .05/.1 levels and you should be playing the .01/.02 games until you build a bankroll of $100, but since you have been playing for awhile...