The biggest task will be "clip by clip tightening." Squeezing out the fraction-of-a-seconds from each one as you “cut on the action.”
When filming, you need to catch the actor moving into the shot and moving out of it – but when assembling a movie from those shots you want to squeeze all that stuff out. There is definitely a rhythm that you will more-or-less “feel” as you are editing.
I use Final Cut Pro as my video editor which has various tools for “rolling” between shots to find the best split-point. There are also several very good open-source editors like ShotCut. You’ll want to get proficient with these. You have good material here.
The first thing that I always do when reviewing material is to mark all of the potential shots and catalog them so I can locate them quickly. I try to mark “in” points and “out” points as I go along although these are subject to change. Video editing software has built-in tools to do this.