Wholesome Polycule Relationship

Hey, hi, hello! I've been looking for a polyamorous romance book, but I only like a very specific version of poly romance and it's hard to find something that fits my criteria. I was wondering if you have any recommendations for me?

1- I don't want an already existing couple getting a third. I get really jealous on behalf of characters when a duo turns to a trio. I would much rather a friend trio turning into a polycule etc.

2- I don't want one "innocent" person and 2 "darker" girlfriends or anything like that. I like bdsm smut, but I want the relationship dynamic to be nice and healthy. Or at least, if it is dark they all should suck equally. No jealousy drama etc either.

3- I want speculative fiction, but not anything cozy. Also not just porn with little plot.

4- I want fff, no men and no amab people. Just my preference.

5- This one is less a "strict request" and more a preference, but I really like friendship group "stereotypes". Like one smart person, one normal person, one gremlin etc. Just distinct personalities (not cartoonish) interacting with each other. Basically just a nice found family group but romance version.

I'd love to know if you read a book that is similar to that. Thank you all to the commenters beforehand.