Ask HN: Making $3000+ residual income monthly? Any tips/advice for a beginer?

Hello HN. I’m a self-taught developer (currently doing an Msc in CS). I mostly do freelance web development. My UI skills aren’t good enough to label myself as a full-stack developer but I’m getting there. However I’m comfortable with server side development (Python and Golang mostly), client/server side Javascript and I also have enough system admin knowledge to run my own server (metal/VM).

Are there any revenue streams I could tap into with my current skill set that would enable me to generate (eventually) recurring monthly income of $3000 and above. I don’t mind putting in the work/time to build it up.