In depth resource for ComfyUI

Hi there, do any of you know of an in-depth guide/tutorial to ComfyUI? I'm looking for something that goes beyond the general setup and talks about the different nodes, where in the workflow they should be placed and so on. Basically a resource that shows me how to build advanced workflows without too much trial and error.

I've been using ComfyUI, but I feel like I'm doing it blindfold and I don't know what screws there are to adjust.