I was first introduced to Medium in early 2017 and then left in 2018 (to focus on Quora).
I then came back with a vengeance.
Honestly, a lot of what is considered to answer your question depends on the work output.
In 2018 when I got my first million views on Quora, I was writing about two 750-1000 word articles a day! and I got to a million in 3 months.
I was working full time in fine dining.
I really wanted it...
There's a false notion that you'll write and article, it will go viral, and all your problems will be solved.
That just doesn't happen.
By producing consistent quality content, not only does the algorithm recognize you, but then paying freelance clients recognize you and the more you write, the more you have the potential for articles to gain traction in terms of viewership, reception by publications etc.
So I would say it was a good year for me of understanding the platform, writing content, collaborating with others before it really started to take hold.
But for $100, you can probably make it happen in a month if you are consistently creating good content, offering up actionable headlines (so readers click), and working with publications and using their extended audience.
I hope this helps answer some of your question.