Actually I think the challenge is not so much in the editing as in remembering that, at this point, what I've done is a beautiful experiment, nothing more or less.
So experimenting with fine tuning/tweaking/altering/fixing/adjusting could be just as much fun as the writing was, though with the company of my Inner Editor (see this post).
A chapter by chapter analyisis is the next step.
Gently does it! I love my word for 2018.
How is your word working for you? (Remember you can change it if it isn't....)