You should have to give a short tutorial explaining what your product does, For example, Twitter has the What, Why, and How buttons right there on the front page and nothing else to distract you from them.
If you're going to do it, try it via Blogging, Facebook, and Twitter work.
You can also purchase Google ads words and other Insta ads, or other Social media platforms.
You can consider an open-source version of your project,
or joining trade groups/ forums related to whatever problem your product addresses,
and start to build engagement but please don't spam these groups.