A good way to promote a small app project?

I've been developing a modest decentralized application for fun for a long time aimed at friends/colleagues using Polygon (see my profile to learn more) and I'm wondering what the best way would be to raise awareness of the project when you have limited resources (hoby, not a start-up).

Social network (which one?), presentation/pitch video, advertising, partnership, AI, special founder support program, …
==> What are you guys receptive to? Builders, what has worked for you?

Any good ideas or shared experiences would be appreciated 😉