Hello Everyone, 2011 christmas i purchased a d90 havent used it since only my wife uses it. she recently purchased a sony mirroless camera 5R. and nikon is sitting there i need a hobbbie so i decided to learn photography. the reason i never used d90 it looked very confusing and hard to learn but now i want to learn it and use it. i have 2 lenses for it 18-105 and 50mm 1.8G lens. on may we are going on roadtrip to vegas, La, Disneyland, Grand Canyon.i want to learn as much possible by then to try take better pics than her lol. so where should i start? i dont want to use auto. where can i learn? i have no knowledge of what shutter is or iso but i know what aperature is any help or direction would be much appreciated.