Let me tell you my writing process, because I am beginning to freak out about Metal Family (my current hyperfixation)!!!!
1. I find a piece of media and hyperfixate on it (*very* intensely, but in JWCC's case it became the root to a 6-year long special interest)
2 I begin to imagine scenarios with myself in it OR alternate versions of pre-existing scenes
3. I begin to draw the above
4. I seek out fanfiction that can fill my appetite for MORE content once I completely consume the media
5. I don't find something that suits what I want
6. I get annoyed and my imagination gets stronger and stronger to the point I need to get the thoughts out or I will get overwhelmed
7. I sit down, put on one song on loop, and begin writing and writing until I have a one-shot
And in some cases, those one-shots end up as actual stories!!