You've gotta start somewhere! And a positive attitude helps! I earned $70.84 in my first month after joining the partner program, but had a whole month, not just three days. After that, I earned more than $100 every month until I stepped away from Medium last summer to deal with some Life Stuff (which I'm still doing). Still have double digit figures coming in every month even though I haven't been here but I have over 300 articles.
I'm not concerned with income here. Just happy to come and read writers I enjoy and share something now and then as I feel like it. Much less pressure and lots more fun!