Up swing poker and blackrain79 have some good tips on BRM but if you start at 50 cents - 1$ BB than you should have about 100BB to start at the micros. They also recommend you learn on cash games first it is easier and most of the strategies are the same going from a cash game to tournaments. This is because tournaments have a-lot more going on and because of the different buy in sizes, tournament structure and tactics and strategies for the game play due to the blinds and antes are always increasing, you have different strategies for early, mid, late stages, the money bubble, the final table and even ICM considerations therefore a-lot more to learn and take into account hence learn the cash game style first then try the low buy in tournaments where the blinds and antes increase every 6/8/10/12 or 15 minutes.