At last, the picture is ready for inking. You can either ink directly on your pencils, as I usually do, or ink on a new sheet of paper with a light box. It might help to use a light box to ink the image as viewed from the back, which can help you catch mistakes in the composition. Inking is not as simple as tracing all the pencil lines, line weight plays an important role in the finished image. Using different line weights can help give a picture more definition and variation, and they can be used to cover up mistakes in line work. I get different line weights by going over the same lines multiple times and adding thickness where it seems fit. It's not a very fast process, but I like to have clean linework. Here is my final inked work:

This guide was pretty basic and didn't cover a lot of things you will want to think about, like the overall composition and balancing weight, use of light and dark, and perspective. There are much better resources out there for topics such as these. One of the things that has helped me most is to study the art that I enjoy to figure out what it is about that art that I like. Otherwise, practice is the single most important asset to getting any skill at drawing. I've been doing it for years, and I still have a lot to learn.