Me personally, revising and editing aren't my thing. I spend very little time.
But to help you conceptualize, try to look at it this way: revising is kinda like adding stuff you need, moving around the sentences and making it sound better. Editing is more like taking out stuff you don't need, making sure it makes sense, and looks nice and cleaned up.
To help you even further, imagine it like this: Let's say you have a car. Revising would be like putting purple fuzzy dice on the mirror, and butterfly stickers on the back. Editing would be like, making the fuzzy dice blue instead, and moving the butterfly stickers to the front.
I hope this makes sense. But don't worry too much about the revising and editing. A lot of people stress this. But if you like your work the way it is, don't think "but it could be better" and get all worked up about revising and editing. Instead think that it is absolutely fine the way it is. And if you're feeling something else, add it, change it, whatever.
But don't feel inclined to. Change doesn't always mean improvement, and lack of change doesn't always mean there's improvements that could be made. No worries. :)
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