Midas Touch is a nice stepping in point. Which is handy given it begins with issues one of the New 52 Green Arrow. There's not a lot of previous knowledge assumed, but we aren't given much introduction either. Things start off quickly, and stay action packed for the bulk of the comic.
I wanted something new, and Midas Touch fit the bill perfectly. I'll definitely be checking out volume 2…I'm just not in any huge rush.