I wrote a whole book and published it back in August 2020, and it didn't give me even close to the success/income Medium gives me. (I don't make a ton on Medium either, but the success/money is definitely more on here than my book.)

Anyways, writers get in their heads that they have to do so much to make it, but I truly believe in giving your ALL to one thing. Of course, this isn't for everyone, but I also get overwhelmed by multiple projects.

You could write more frequently and engage with the community more. Instead of dividing your time up, give it all to Medium.

Of course, this is just my simple advice, and it's good to do whatever you feel is right for you. <3