Advices for validation an Inventory Forecasting Micro SaaS.

Hey everyone! Long time that I don't access this forum but still been trying to build things without success :)

Biggest problem that I face is doubt. I don't know where to post, how to reach people, Reddit seems to be annoyed by devs posting stuff in random channels, in fact, sometimes I receive messages from people trying to sell or build stuff and honestly, it's annoying even to me as a builder.

Recently, I have been exploring a lot on inventory planning and forecasting, for me the experience has been super fun, learning about all this things, and I have noticed that current tools are too overpriced and complicated. I would like to reach out to people, or start posting content in a way to generate some traction for validating my idea, all without success. I want to give people value before asking for money, but I always face regrets at the moment of creating or posting.

How would you approach this? My main audience would be small businesses. Maybe trying TikTok or Instagram could help?