Hardly anyone makes money straight out of the gate, and there are many who don’t earn anything.
Find a problem that people are desperate to fix, and create a solution.
Then start writing, slidesharing, youtubing, or whatever to make people aware of your expertise.
You’ll need to create a critical mass of content online.
50,000 words on your blog is not unreasonable.
And then you have to promote those posts everywhere that you can.