If your budget allows for only a single lens, we think the Nikon AF-S DX Nikkor 35mm F1.8G is the best starting point for most people. A prime lens doesn’t zoom, which will help beginner photographers learn to compose shots and get close to the action without relying on zooming in. The wide aperture allows for shooting in dim lighting.
It’s also one of the least expensive Nikon lenses. If you’re using a full-frame camera, the Nikon AF-S FX Nikkor 50mm F1.8G provides a similar view at an equally attractive price.