Wow, thank you for the input ClockworkOcean! Indeed your post helps a lot. See, I have a certain work background on using Material BP’s and know how to read Blueprints or simple C# / C++. But coming from a very artistic driven life, I almost go with trial and error approaches on building up BP’s with pretty basic: “if > then > else > or” logic. That works…sometimes 
but not every day and then I get lost in the node-woods and running against walls if I build up a blueprint which of course will not work in the way I think it should be…and then one of my coding friends is telling me: Nah, thats ultra easy…and then makes a node network that looks like the Matrix itself. (aka BP’s from hell)
Little hints like “widget” or “ID’s” giving me a good base where to search for. I will, of course, keep this thread updated with my progress and hope it will also help other artists to understand this wonderland. Thank you!!