System Newbie needs advice on class

Okay, so been looking over the core book and the future supplement, the only two things accepted in the game, I so far made up my mind on a concept and decided I want the tracer advanced class, but being the noob at the system I need some help.

How I picture my char:
Kind of a special operations type, assassin, hand to hand or melee combat expert, interrogation expert, still good enough to hold her own in straight up combat.
As for personality thing that effects skill choices and perhaps other things: I want her to be fairly charismatic, not needed to be very charismatic, but enough to be useful in that regard.
Also I don't have all that great ability scores to work with.

So advice?