I'd start by asking an ugly, but critical question: how do you intend to keep it funded?

If you don't want to allow easy enshittification, what does that site/product look like, for which users, and what is the value prop that makes that appealingAND at what scale?

I think most YC folks only think in "webscale" and not in any niche or boutique upmarket way and that acts as a forcing function for how much and how fast something scales, which in turn influences so much of the rest of what you do around that.

I don't want to suggest what Friendster ought to be, but I do think you need to decide how you want to ascertain that, and then look into the "how"