Quite a few things to think about.
Micro limits on Fulltilt have quite a high rake compaired to other sites.
I would stay clear of the micro limit cash games on Fulltilt because of the high rake. I'm also assuming you mostly play freerolls (tournament style games, FR's, MTT, STT) seeing as that's how you got the $6. So if you do make this transition realize that ring games and tournaments both require a different skill set.
Tournament play is probably a better idea for your bankroll. There is a tournament a few times a week for $.10 + 0. Not too hard to cash in and similar to freeroll play (I think it might be a rebuy and/or add-on). They also have the $1 Ferguson, which might be worth a stab.
I would recommend reading Chris Ferguson's guide to bankroll management for some direction.
Other options would be to build a play money bankroll. On Pokerstars
you can actually sell play chips to certain people for a good chunk of change. This would give you more room to manuever and a nice start-up bankroll. On Fulltilt there is a 500,000 play money freeroll, which pays nicely and is relatively easy to cash in. Either ways can help cushion your roll.