Where (here?) to get sincere feedback on a story proposal

I am brand new here, so please forgive my ignorance. I did at least read the FAQ, but still wasn't sure.

I have a story, essentially a memoir, maybe slightly fictionalized for reasons, that I am considering writing (well, I've actually started, multiple times over many years). I want sincere feedback on whether the idea is something anyone would have interest in, i.e. is it worth the effort of laboring over this?

Recently, in the course of just naturally responding to random Reddit posts with hopefully relevant feedback/insight/perspective, I've recounted a few anecdotes with a few redditors chiming in that they wanted to know the rest of the story. So, that has festered a little bit into ... maybe this is a tale worth telling?

Is it appropriate to post here a high-level overview of a story and request a sincere yay/nay vote? Is there a dedicated thread? Is there a more appropriate forum? The more honest feedback, the better. I know I could write the whole story and try to shop it, but I'm hesitant to write War and Peace only for it to live on my Google drive for posterity.