In terms of editing, it's hard to learn how to cut that content. You're close to it and think it's awesome. But you have to try and step back and be objective. Is the content actually adding to the video? Is it repetitive? If you cut it does the story still hold together?
If you can answer those questions honestly and objectively it will help you cut a lot better. I've said it before, but I usually cut at least three times. A rough to get rid of the dead space and botched takes. Then I cut the repetitive stuff or talking that's obviously just filler. Then I really listen for pacing and narrow down the content to only include what moves the story along.
My last video was like 12 min initially and I cut it on the last cut to around 8:30 I think.