Do you do a post game/pre game analysis of your hands?
Also, and some may not agree with me, but even at 2nl, IMHO you should have a bankroll of 100 buyins. I have done what you are doing and it is know as scared money. I think that you will blow through your $50 and reload a few more times. You are going to get sucked out on. But if your bankroll will not support taking a few hits in order to then make it up later, you are setting yourself up for failure. Again my $.02 worth.
What outside learning have you done? There is a TON of good ideas here and on other sites and forums.
Let us know how things go.