For your first song not bad. I use bandlab too, lower the overall db and then tweak the eq and lower the high frequency so you don't hear that whistle noise and you're good
Don't give up bro. When you first decide on a million dollar idea, you're nothing more than somebody looking for a voice the first months-year. You keep at it, study proper mixing, then I'm sure you'll rack up a bunch of followers. Keep your head up and stay strong brother, trying to get into it as well 💪🏻