You don't have to be a naturally good writer to write and sell books.

Fail forward. It's the challenge and overcoming the failure that's fun.

Niche websites are doing well at 10k hits a month.

Amazon is a search engine.

Do the research and see if your book going to be successful before you write it.

Develop a skill. Having one thing you're an expert at is more effective than being a jack of all trades.