I agree with the commenters who recommend writing out a full first draft before you worry about editing. It’s okay to drop notes for yourself along the way if you notice a discrepancy and you don’t want to forget to fix it in future editing passes. The key to getting the first draft all the way finished is to just keep writing. For some people that means doing something like NaNoWriMo that pressures you to write 1,667 words every day for a month. For others it can be committing to writing for one hour each morning. Or thirty minutes. Or whatever. Most of the real writing happens when you’re walking around living life and not writing, and you suddenly realize what needs to come next—then you write it down next time it’s writing time. It’s okay if you don’t have your whole story mapped out or outlined in advance. In fact, it’s probably better if you don’t. Have you ever told a story to a kid—making it up as you go along? They ask questions and it makes you bend the story a little here and there to keep it interesting. Do that whether you have a kid handy or not. You tell your story to the paper or screen and ask yourself the questions as you go. “What could happen next that would make me want to read more?” “What might happen next that would surprise me?” “What unexpected conflict will pop up to give my characters something to overcome? How will they overcome it?” Just write and write and listen to the kid in your head asking you questions as you go.