It would probably be best to play the Sit&Go's on PokerStars to build up your bankroll, 9,18,27,45,90,180mans, pick one or two games to study & play for example 90/180mans ect.
Play regular speed to start and add in some turbos, if your good at turbos then play more of them.
Off peak time on PokerStars for MTTs has smaller fields too, 00:00 - 11:00 UK time.
Run good!