yeah sorry the idea there is to move over stuff from our handbook like https://ritza.co/handbook/how-we-work/our-production-process... - but it's hard to separate what is specific to us and what is more generically useful so that is still a WIP.
I think it's hard to advise a process as it's quite personal. Some people write down bullet points and expand, others write and rewrite until it's what they want. I think we're far from having enough research to know if one way is 'better' than another or not, so for now we mainly just advise writing as much as possible (https://styleguide.ritza.co/improving-your-writing/how-do-I-...) and figuring out what works for you.
Structure is really hard so I don't have any easy answers for you there either, but https://styleguide.ritza.co/ritza%27s-writing-rules/Style/#k... talks a bit about how the writers job is to go through exactly what you're describing so that the reader doesn't have to.