Acknowledge compliments and thank people for their work. Admittedly I’m not perfect in this, but it really makes me feel good and the other person too. If someone says I’m good at x I say thanks. Likewise, if someone helps me on a project I make sure to make my appreciation clear.
I have several somewhat niche interests and my favorite is Weezer shitposting. A community for it would be really coolz though I doubt who would post.