So I have a seemingly simple question, but I just cannot figure out what is going on whatever I do and cant find any posts on this issue anywhere.
I just want to get the position of a Node2D. Nothing more. But neither position nor get_position() give me any result, and I just get this error:
"Invalid call. Nonexistant function 'get_position' in base 'Node (name_of_script.gd)'"
Maybe Im just stupid to see the issue but Documentation sais that Node2D should have that attribute or method, but they dont work. Help please!

That error message says that you're trying to get the position of a Node, not a Node2D. A Node2D has a position, a Node does not.