I just went through a very similar thing. I had very long hair that had no shape and bangs that I'd had for eons. I finally broke down and went to an actual stylist (spendy!). It was the best thing I have ever done. He was fantastic. It wasn't one of those situations where you show the person a picture of what you want and they cut your hair into something similar (or not). We actually sat down and discussed what I wanted, how much time I had to spend each morning on styling and stuff like that. Then he spent three hours cutting and coloring my hair. It was fan-fricken-tastic. I was able to keep the length and losse the bulk. I have an actual hair do now. It's great. My upkeep is quite a bit less expensive than the initial appointment was, so it's very doable.

Anyway...to make a long story short (too late) I suggest paying someone to help you out. It's worth it.

i had long hair before, i decided to try it a little shorter (mind you, the longest layer is still about a 1/2 an inch past my bra strap if im looking ahead, but it's short to me) anyway, it felt GREAT to have it that much shorter, with the layers i can actually swing it around, and my whole head felt so much lighter! (i had long hair since i stopped being a bald baby)
im not trying to talk you into cutting it shorter than you were thinking of, just giving my experience, so you can consider it ^_^

i also second going to someone that you trust and talking out what you want and what will work with your hair/face/routine
good luck!

I have a round face with some serious cheeks and I love my shorty bangs. I usually have my bangs cut blunt straight across above my eyebrows I have a bob haircut but even if I decided to grow out my hair I would keep the bangs.