$5+1 on Party. Blinds 100/200.

Stacks:
MP: 3130
Button (HERO): 1595
SB: 1085
BB: 2190

SB and BB have been playing tight and not very aggressive.

Hero is dealt [Qc 8c]

MP folds, Hero??

First off, I'm relatively new to tournaments having played most limit ring games up to this point. I've noticed I have no problem getting into the top five, but then I have problems. So, I'm trying to get some of the basics down for when I am on the bubble. So for this specific situation:

-what percent of hands I should be pushing at this point?

-Am I in all-in/fold mode here because I have less than 10BBs or would a small raise be ok (and at what point do I go into all-in/fold mode)?

-how much of a consideration is it that I have a slight lead over the small stack, specifically should I tighten way up and go for third or be very aggressive?