Thank you! Problem resolved!
_
For others who might wonder how it looks like in blueprints:
Get actor location, then break the vector, then add +500 either on X or Y respectively, then make it vector again and then do vector minus vector node and subtract actor location to get “pure” (so to speak) vector out of it. Normalize the result and do DotProduct + acos to get the degrees.
Thank you again 42EspoiR !