Ok,some hints:
1.if you write "$variablename" into text,it will show the value of a variable.
2.if you make an attachment to an actor,make one,add an code in the rule called "modify property",then go to X/Y position,choose not a constant number,but a behaviour property and make it (axis depending on what you've put in the beginning) and "actor that created me.
When done,just add the simple "create an actor from the blueprint" rule to the part you want to give the attachment.
3.if you want to draw complex stuff,use paint,it's easier then using shapes for small details.
4(random ahh thing).try looking for what you mostly see in castle and you can make a good game out of the popular factors(don't forget to ask the creator in the comments)
That's all,have fun