The first ever game creator I used was Scratch and they used a block based programming system which was million times simpler than the blueprint system. I taught my self through experimentation and trail and error when using scratch but cannot do this in Unreal Engine 4. How should I get started?
HI
I did and still learning.
First up, you can do 2 things
Unreal has 120= videos on teaching you on YouTube.
Number 2 - Make a simple game and just search and ask for what you want.
If you have done nothing, I would look at the basics on YouTube, so you have a basic understanding.
P.S. Video not for 4.7, but 99% stuff will still work.
Hey 
Did you ever work with a programming language?
Because that’s basically what Blueprint is. It uses exactly the same logic and the same structure. Without at least knowing the basics of that it will be very hard to properly learn blueprint to an extend where you can actually create solid gameplay…
Personally I would suggest learning java as it’s the go to language is with a whole lot tutorials of all different sorts and probably one of the best to teach to yourself. A more direct approach would be learning C++ as you can directly use it later on for UE4 as well.
If you plan on doing mainly artistic stuff like models, materials and so on you can just watch the Unreal Engine tutorial videos (as linked above). They are about enough to get you started and should provide you with most knowledge to do simple things. Though there is no way around a programmer or properly learning programming if you want to create something remotely serious.
I hope this helps. Probably not quite what you hoped for but there’s no real way around programming for a game 
You can either check the Epic Games youtube videos, the countless number of tutorials around, The wiki, The documentation or even my books!
Watch and try and follow the blueprint series on the unrealengine youtube channel
I got to about 20 i think out of 43 or something before i started getting lost.
I then switched to KitatusStudios free ebook.
After i did book #1 i felt comfortable enough to break things and start figuring out how to fix what i broke.
Just watch vids and Experiment yourself
also don’t get attached to stuff when learning. as u will always find a better way to do something once you learn more.
I’ve experience reading scripts and php so I’ve got programming basics down but I’m having a hard wrapping my head around blueprints to be honest.
I have watched the the 2 blueprint intro series on YouTube and read most of the wiki but I still have large gaps in my understanding of the system and I cant even get a simple button to do something.
I think the biggest flaw is that you need to know how to do something in order to make it. It’s not as intuitive as the tutorials make it seem. It’s not just dragging some lines and the system will show you your options.
Especially the way blueprints need to communicate with each other and how variables work is complicated and quite frankly I don’t get it.
When I have my eureka moment I can probably elaborate more on what info I was missing before, right now I don’t have a clue.
What do you want to do?
In terms of the button - if you mean a key press - you need to enable player input in the settings for that blueprint (it’s set to disabled by default)
I Really enjoy your books on UE 4 Kitatus