Here's my method for outlining. I don't outline for every story I do, but I find it's helpful when I'm not sure what direction I'd like to take the story.
OUTLINE BLUEPRINT
1. Come up with a subject of the story you can describe in one key sentence.
2. More importantly, why you want to say it.
3. Then, if possible, come up with a few scenes to briefly outline, all of which relate in some way to that plan. Scenes which do not advance or reinforce your main reason for the story should be cut.
4. Start writing. Once you start writing, feel free to deviate from the outline as much as you'd like ( a great writer once said you need to have a plan and don't follow it.)
Your brain needs to focus 100% on the writing. If it is split between writing and planning, you won't be nearly as effective. You need to know what you want to say and why, first.
Here's an example for the Michael/Michelle idea, one of the losing candidates from the Patreon voting series I did last month.
1. It's a "Good Boy to Bad Girl" style TG story with the character going from male conservative Christian to punk lesbian.
2. I want to explore how the concept of being a "good person" with shifts in religious identity, sexuality, sexual mores, and more, allowing the character to embrace a kind of hedonistic ethos and reject repression and self-denial.
3a The character starts off being very pious and always doing thinks just so, so there's an example scene to introduce the character. Then, maybe they encounter a witch or some other kind of person who "curses" them after they display a form of righteous intolerance. Then there are several scenes showing them changing, losing their old lives/friends/identity, and then becoming a happy punk lesbian character. I'll keep in mind that each scene should reflect the themes I mentioned in #2 above.
4. Now I'm ready to write!
REVISING STRATEGIES
When I'm very confident, I don't usually need to do much editing or revising. I even seem to make less typos. However, a new or complicated story will sometimes need to go through multiple revisions.
Part of the problem is that revisions can slow you down. If you are constantly revising, you're never finishing.
Often, I feel it's better to finish a story than stop and do too many edits. Even if you are certain you want to give something a major overhaul, just continue writing your story as if you've already done that overhaul. By the time you finish, your perspective on what you wanted from the beginning may have shifted yet again, and you don't want to do a round of revisions for nothing.
Also, if you finish first, and you're not able to edit, at least you have something you can tweak later. That's a much less daunting task than a perfectly written half of a story that was never finished.
Bottom line: continue to try to finish your story no matter what mistakes you've made, then do the editing all at once, after you've finished your rough draft.
If you feel that these pieces of advice were helpful I'd be happy to go into these strategies, and others, in greater detail. Leave a comment if you want more advice on writing.