Advice or Tools For Creating a Published Adventure

I got finished with my peer-review paper examining hate crime in the USA and I wanted to work on something light to detox after having to interact with some awful sentiments.

Any suggestions on where to start or handy tools? Right now I have my adventure I've been DMing in OneNote but it is truly scattered. It is all inserted Excel spreadsheets for random dice tables and blurbs. I've never done an adventure but I have published sheet music, short fiction (as a ghostwriter), notes on medical instrument designs, coding scripts, and although the hate crime study is on hold at the advice of my peers so more data can accumulate I have published other academic work. I enjoy writing but I am totally unprofessional about it even though I have been published.

Anyway, I am not looking to make money I just need to escape this other work because it is terribly depressing and I want to have fun publishing an adventure that people have come back to play with me after finishing it more than once since I began running it a few years ago.