how do I organically market my app on reddit?

so i'm a little stuck / confused. - everyone is talking about how they're marketing their product on reddit and that concept is slightly ambiguous the subreddits that are engaging don't really allow for self-promoting unless it's really sly and the self promoting subs are just a bunch of people promoting their stuff and not really checking other people out. so what exactly should be my strategy.

for context: i'm in development stage, my waitlist is now live and I have kinda of my slightly pushing on reddit (okay only posted about it like 12 times) but I have had 0 people join my waitlist : / (so im not sure my current strategy is working) but all of the feedback I have received on it are really positive and when I go into subreddits talking about the pain point my app solves, I get loads of people who relate. am I then meant to reply "hey btw, i'm building an app that solves this join my waitlist" ?

this may sound silly to the more exp'd founders but i am really confused, all help appreciated!