@Poppie Mods, my friend. Use the mods. The modding community for CK3 is great. It was especially necessary to fix the seduction, cuckolding, and cheating problems early on so that my family lines were actually mine. I still keep them running just in case.
I learned years ago that if I’m going to get DLC for a CK game…wait for Black Friday when you can get 2 or 3 for one on Steam. That’s what I did for Stellaris last year.