I would also like to know. Asking HN is not always working, as you should either piggyback off some quasi-related top page post in the comment section (and even then: remember dropbox comment) or hit a very good luck to generate updoots at "Ask HN" purgatory stage. Indiehackers is a circejerk of self promotion ("Hi, I liked your post very much, here is my website:"), Reddit is rarely helpful. IRL groups are mostly filled with wannabes that either dont want to discuss their idea unless you sign their NDA(lol, I wonder if we will ever get past this stupidity) or they dream of doing next facebook, linkedin, netflix.