I completely relate to your article. I have a full time job as well and have recently ventured into the world of professional writing ( although writing has been a lifelong liking).
Regarding your question of how to monetize Medium, you can check out this article https://medium.com/illumination/how-to-get-paid-on-medium-for-writers-from-india-e95aafbc8fdb
I havent tried it though since i am yet to publish to any publishing site. But you can check this out.
Let's stay in touch :)