You're doing sooo well. Some people write on Medium for YEARS, but don't make even $100/monthly. Just keep going and be patient! If you keep writing, in a year you'll see the difference. I've been here for 1 year, and I made $1,900 last month (including the $500 bonus). Imagine what can happen in 5 years? :)
Also, Medium isn't the only writing platform. You may end up exploring other websites too.
Writing = freedom. That's why it feels so exhilarating. Because it's freeing.