Somebody above mentioned Googling your name - have you done that, and if so, what comes up? That was the very first thing our lawyers did before taking our case, as they said it's the first thing the immigration officer will do too. You'll need to be at the very top of your field (awards, published material etc) to qualify for EB2 NIW.
Our lawyers were Fragomen if you want another opinion, but Chen is supposed to be excellent too, I've only heard good things. And they'll tell you if you have a realistic chance or not.
Just checking that you're not planning on carrying on working now? In all honesty, it would be much easier to go home. It took our lawyers 3 months just to put our case together, any decent application isn't going to be quick.