How does the node editor work? There no tutirivals on it.
Really? I just googled ‘blender node editor tutorials’ and there were literally loads of ‘beginners’ guides.
Here’s one just picked at random: https://artisticrender.com/the-complete-beginners-guide-to-blender-nodes-eevee-cycles-and-pbr/ (if you like to read tutorials)
Here’s another: https://www.youtube.com/watch?v=ETMoOhAgXiY (if you prefer videos - this is for Blender 2.79 - but the principles are the same)
And there are many more. I’d have a good look round and then come back with any detailed questions you might have about individual nodes or problems you encounter. Your original question is a bit wide ranging.
I donthink think I looked properly. Lol
it’s called Shader Editor since 2.8 though