So, i have a really good idea for a game which i have designed the layout for in PS and planned out how i will have the game run, it’s a simple hide and seek aspect, but it works with AI searching for the player, i know the Radiant Engine like the back of my hand, but i am completely new to UE, i’ve got an account on lynda from my college course and doing Games Development at college in UE4, how easy is UE4 to become second nature to?
Thanks 
How easy? Very.
Its actually very easy depending on your programming skills. I found UE4 C++ somewhat frustrating to use in the beginning but as you do more and more with it, you know all the tricks and pitfalls 
Unreal is easy to learn if you have previous development experiences.
I agree.
The basics in Unreal is easy to learn but it takes a lot of time to master just some of the aspects and I don’t know anyone who master all aspects.
I will say that everything will look easy to you after Unreal Engine.