Hi, welcome to the forums.

I have no useful input to offer you about where to play, although I have heard that Cake is pretty good. I was away from poker when the UIGEA stuff happened, so I don't really know most of the details, and since I'm from the UK it hasn't affected me other than to make the games decidedly less fishy than a few years ago when I remember party poker being very very soft. I was beating 100NL then, and I am only just beating 25NL now, albeit after a long break. That may also be just a general effect of online poker getting more serious and credible, rather than specifically the loss of a big part of the clientelle.

Whatever you do, start out with a plan. Have a proper bankroll management system, be very conservative about bankroll, stop losses and tilt control. Have a learning and development plan, play a lot and review a lot in Holdem Manager or PokerTracker. Be systematic, and start from the very beginning in a thorough, business like way even if it's at 2NL.