Take your time to slowly learn about these, don't need to rush. Be glad you're learning in a DSLR age. In the film days when I was learning my basics, every shot is $$. Anyway, I am still learning.
It is never hard to learn anything, its about how much time and effort you wish to spend in to pick them up mastering is more than effort though, we will skip that first
one thing about photography, you will be surprise when u truly understand the basics of photography, you will be able to take beautiful photos off lousy equipments like a handphone camera
pick up your camera and join us, welcome to the club