I found a chill SMP called Jujutsu Origins. It is just normal survival Minecraft but with the ORCA Jujutsu Craft mod on.
There is no forced roleplay and no big serious lore. You basically survive and build like usual then you work on unlocking cursed techniques as you go.
PvP is optional so it is not supposed to be constant wars. It feels more like a small community where you can grind mess around explore and fight mobs or bosses when you feel like it.

