Okay take this with a big bucket of salt, took a year off from work last year and my initial idea was build something(failed miserably, total disaster, will try again sometime in future) but since I was totally unaware of how the whole marketing and market research thing works, I tried summarizing [0] everything at a very high level to get started, it helped a bit both when trying to build whatever the heck i tried to build and also to have a general understanding of the steps. hope it helps :)
[0] : https://blog.geekodour.org/posts/market_research/