@sp44ow3hh2wk
I have around 200 Sims I think. Some of my creations are on this thread: https://answers.ea.com/t5/General-Discussion-Feedback/Share-Your-Newest-The-Sims-4-Creations-Here/m-p/11511696#M61947
There are all kinds of different amazing creations from other players too that you might be interested in. Both Sims and Builds. Some players have added theirs to the Gallery too and they are awesome. Look out for a building on there that looks like a cat if you have cat's and dogs!
I usually start out with a big family of different generations and split them into different households to play them individually. I add different relatives in Manage Households later on if I want to keep that family going. So my favourite family is the Soldado family who started with elder parents with 2 adult and 1 teen kids and an adult sister and a best friend for their older daughter whose surname is Reyna. The older daughter now has her own household with a husband and 3 kids, the sister has hers with husband and 4 kids, the teen is at University and the son married his sister's best friend and they have a household. I add in laws for the spouses and then create households for them too. So I end up with a network of family members across worlds. I've done similar for a few other families too. The Soldado, Marquetta, da Silva and Soto families are all related and span 5 different worlds and I've lost count of the number of households.
I'm going to DM a tip to you that I've figured out to help your Sims while they keep losing health. I'll not add it here because it's my own cheat I've designed for console and it looks a bit daft but it does work.
I'm not able to play my game at the moment because of crashing that got a lot worse since the HSY patch many weeks ago and I also don't want my complex family networks to be damaged by the autonomous mean interactions bug. So once these are fixed I can play again. I usually play it every day and have done since Sims 1 so I'm missing it a lot. I've got other games but nothing beats the Sims for me.