Site Growth - Music, Chrome Extensions, Art

Hello. My current site ( art, music, chrome extensions ) is here https://jacques-applebaum.com. Wondering if there are common paths to begin to get feedback and see which subsections people are interested in.

I'm using ads for growth currently. I'm wondering how to get enough growth to get feedback. It seems that I should do things that don't scale and look for a few users manually, but I'm not sure where to start. Maybe some niche forums etc?