Thanks for the reply’s @ScottSpadea ! I tried reading it and understanding it, even tried it (I think), but it seemed a bit complex, so I tried a tutorial. Maybe you understand the tutorial it better than me?
So I’ve looked at a tutorial. I followed the youtube tutorial
( Unreal Engine 4 Guide - Scoreboard - YouTube )
and it gave us this:
(It’s a LARGE ((2104x2272)) picture, where we gathered it all, so if you want to take a look you should download it and zoom in to see it more clearly if you already cant).
I see how this would work, and I understand most of the setup. However there are a few details which I need to understand in order to make this work for my game. As you can see in the «PlayerController» blueprint, there is a red box around a Integer variable that I named «fix». The guy in the tutorial (as far as I understand) uses that integer to connect it to the coins he picks up (which gives him a score), and thereby connecting the score to the Score Board.
Here you can see our Object PickUp BP:
(again, you should download in order to see clearly, if you already cant.)
You may notice the yellow marked integer. Is that the integer we’re suppose to somehow use in the «PlayerController blueprint» ? Or is it something else? At this point I`m a bit stuck.
Hopefully someone knows what I’ve done wrong / what I’ve missed.
If there are any problems with the images, please let me know so I can post ever picture in single files with better resolution.
Keep in mind I`m not a blueprint expert, so please be gentle with the techincal language! hehe. 
Thank you in advance!