New author tips?

Howdy! I haven't ever wrote anything but I have a million ideas. I always enjoyed writing in college, and I think I want to try my hand at writing. So far, I have been tossing ideas in a google docs, with a million characters. most of them are powers, appearance, gender, romance, personalities written up. A couple of them have story ideas, more general arcs and who would be the bad guy and who would have what motivation, and why they would be friends. 

My question is how do I go from a semi organized bundle of ideas, to actually starting a story?
Also, feel free to share writing process or tips in general. what works for one may or may not help everyone but it is good to kick off a discussion

Ben