Comic Book Recommendations

I've been a fan of comics for awhile, but I've always stayed away from superhero, Marvel, DC stuff. There is so much history and it's hard to know where to start. Yes I know google is your friend but it is still daunting.

Recently I've dipped my toes in a bit. I've read the 2008 or 9?? run of Guardians of the Galaxy and have been reading the current run. I've also been reading and enjoying the newest Captain Marvel, Ms Marvel, and Black Widow.

I've been interested in Birds of Prey, Green Arrow, Captain America, X-Men and Thor, but have no clue where to start. I heard New 52 was not so great? So any rec's for where to start with some of those or any other series that are good would be greatly appreciated.