How about a modern fantasy comic? It features a household that has 9 children, lots of adopted family dynamics, and often the kids are often doing their own thing, the Main character Yinyang has a mystery she tries to uncover on her own if the first arch!
I will warn you I've been working on this comic for a long time so the art near the start isn't nearly as nice as what I can do now (Like the art on the cover)
The comic is about a young girl that gets kicked out of an orphanage for her unpredictable powers and ends up getting taken in by a shapeshifter into a mish-mashed adopted family. she has to learn what it means to be herself, be part of a family, and uncover whatever the family's butler is hiding before its too late!
The comic has got aspects of modern fantasy, mystery, found family, and slice of life (as well as tiny bits of science fiction but thats far from the main focus). I'd probably rate it at PG-13 (specific Pages with PG-13 content are flagged as such in the episode tittles as well)
Heres the link if interested! And if ya like it feel free to ask questions!
https://tapas.io/series/TLC