itch.io

I got no idea if it is 3D, just starting it myself. Hopefully I can get through it quick though then I plan on moving on to something called "Blender and Godot 4: Make a Low poly Ps1 Style Horror game" on Udemy. Noticed that you commented on some low poly horror stuff on Itch and figured the course might interest you as well

EDIT: Also if you have some coding experience but are new to game development like myself, the official Godot docs page does a pretty solid job of explaining the "design pattern" / structure of the code you'll be writing in the engine. I've tried some other courses in past and found them to be extremely frustrating. It always ended up feeling like I was just doing a walkthrough / following a recipe without fully understanding what I was doing or being able to then take what I learned to go do something different and figure stuff out on my own

https://docs.godotengine.org/en/stable/getting_started/introduction/index.html