Welcome to the forum. You are going to love that D7100. It is a beast of a camera. There is a bit of a learning curve to get it to where you want it to be so hang in there and ask lots of questions. There are a lot of us here that shoot that camera including me. Start by sharing some of your photos with us here.
Guidelines to adding a photo to your post.
1. Resize photo to 1000px on the long side.
2. Resolution set to 72ppi (Pixels Per Inch)
These guidelines will be good for viewing on a computer but will not be good for printing. This will help safeguard your copyright.