play a minimum of 15k hands at each limit (.5/1 then 1/2 etc)
Once you have played 15k hands then move up, providing you have a significant enough br. If you dont, continue to play at current stakes until you do.
If you play 15k hands at .5/1 you only need to run at 2bbs/100 (big bets) to be able to move up after 15k hands. (if my math is right!)
Nice and simple.
If you play 6 max try to look for a bit deeper bankroll, but dont lose sight of moving up as quickly as possible if you are beating the game.
Good luck!