I’m a newbie just like you, its something that you will start to understand in time… I totally understand where you are coming from, when I first started even just looking at the unreal interface I was like dammmm… How do I do anything? I been using the unreal engine now for 1 month, but not that much as I mostly been inside blender trying to get things to work the way I like them 2. I was first trying to do things in unreal that you can’t do lol… I was trying to do things in unreal that you have to do in 3d modelling packages. Over time, you will get used to the functions and start to get a bigger picture. Its not something you will grasp in 1 day… Its about experience and practice using the blueprinting… I don’t know that much yet but I am coming to terms with it and starting to use some of the functions and as you use them, you start to have a play around and find stuff that connects and does the job properly for you. One of the things I do is trial and error (Oo what does this do lol).
You start getting comfortable with a lot of functions and learning what each one does, I don’t know that many of them, but I am getting to know by using them. You have to spend time, have something in mind you want to do, try and achieve that goal within unreal and it will all come together, trust me 