The previous answers are excellent.
An additional comment . . . support your local camera store. Most of them across the country are gone. One comment I hear too often is: there are no camera stores anywhere around here. Also, the people at the box stores don't know anything. Of course not, they're not photographers. It's a tough business, margins on new cameras are small. Camera stores provide a great service: information. Without support they will all be gone. Then try to get a hands on experience. You can't try out a lens on line. Also returning a camera at a box store is easy but you may be returning for the wrong reason. They can't set up a menu for you and your camera experience may be poor because of incorrect settings or lack of information. Camera stores provide a lot more than cameras.