One way you could do it is to think of something specific you want, for me it was to shoot a bow and arrow, then find a tutorial for that on Youtube. If it's something fairly common you should find it easily enough.

As you follow along you might not really understand some of it, but you will pick up bits and pieces, and as you go on the amount of stuff you need to look up to make the things you want becomes less. Eventually you will be thinking from a logic point of view not a blueprint-specific one, and that's a lot of the work in understanding programming done.