Agree. But I'd like to add one more thing.

Just like you, I developed a product and posted about it on Reddit, and received a ton of upvotes and comments in just over ten minutes. So I knew I was in the right place.

But then, moderators deleted my post cause they don't like promotion here.

I've tried X, youtube and other social medias. But it's like shouting in a crowded train station—no one can hear me.

So I think it's hard to harness the leverage of online marketing right from the start. Perhaps we should reach out to each customer one by one during the first phase.