I'm going to be borrowing my sister's D5200 to document the first few months of my son's life. I'm very interested in your cheat sheets package because she also has the 55-300mm lens attachment. I have no clue about photography but am reading your stuff as much as possible. My question is, in these cheat sheets, does it tell you how to focus on just the subject( the baby) and blur out the rest of the background. I'm solely going to be using the camera for portraits and of course documenting his first Christmas with lights in the background. Thanks in advance and sorry if this info is already posted somewhere!