Maybe start off with a blog to see if you can get traction/attention.
I created a course about technical book authoring and interviewed a dozen authors. Some made a lot of money from writing. Others less so. Those that treated it like a business seemed to make more money (from the book and related activities).
I think my problem is my knowledge isn't very domain specialized.
I know many tips and tricks that you might thank me for telling you about software but they are sparsely connected to each other. They are connected by my journey of software engineering and the interests I gathered along the way.
So blog might be the way to go. I am going to create my first blog now.
I created a course about technical book authoring and interviewed a dozen authors. Some made a lot of money from writing. Others less so. Those that treated it like a business seemed to make more money (from the book and related activities).