It’s always pretty hard to begin with game development, regardless of which engine you are using. But when you have enough time and a strong will you can do everything 
I also made my first step with the Unreal Engine and for me it was pretty easy, so yes, I think that the Unreal Engine is good for beginners ^^
Nope, blender isnt the easiest software to begin, because in my opinion every 3d program (3d , maya, blender,…) is hard to use (especially when you are a beginner, but after some time it’s pretty easy ^^