you start off with a class and a origin that impact on the vanilla gameplay. If you don't like these at all, you can also pick the "Human" origin while playing with friends on a server
also
Terralith is a biome mod that adds nearly 100 brand-new biomes, as well as updating almost every vanilla biome with new and improved features. It also includes tons of completely new terrain types - canyons, shattered biomes, floating islands, deep ocean trenches and much, much more.
- Mob Origins (by UltrusBot)
- Pehkui (by Virtuoel)
- Fabric API (by modmuss50)
- Origins++ (by TheQuantumXenon)
- Origins: Classes (by Apace100)
- Just Enough Items (JEI) (by mezz)
- Extra Origins (by MoriyaShiine)
- Mouse Tweaks (by YaLTeR)
- Origins (Fabric) (by Apace100)
- Terralith (by Starmute)
here are all the mods i used

