Tutorials are not here to teach you the subtle ways, how’s and why’s of Blueprints but only to lead you in the right direction (I mean, most of the tutorials I’ve followed are not well designed, not to blame anyone but the authors usually don’t have much educational skills, nevertheless without them I wouldn’t be there).
And yeah everything is confusing, Unreal 4 is a big engine. You just need to breakdown the big task into lots of small tasks, pick one and get started 
We started Unreal 4 with a coworker. For 2 weeks we followed every epic tutorials, doing the same thing the guy was doing. Then we started a learning project with several goals (UI, Enemies, Weapons). It all started from here. But it needs you to be motivated.