The cons of a revolver? They hold less rounds (6 as opposed to a semi-auto that can hold 10 or so) and the MAY be less comfortable to conceal due to the bulge of the cylinder. But recent advances have made revolvers slimmer.
I have less experience with revolver calibers but they come in .45, .357, .44, etc... Lots of stopping power so the extra capacity may not be necessary.
Good luck. Don't be intimidated. Firearms are a tool like any other.
But...given the direction of this country and its failed leadership...I think its high time I prepare myself for ALL eventualities...or at least as many as I can.