You can learn how to use the basic functions of Inkscape in our workshop.
There are also some secondary settings that are helpful when making your own projects.
Tracing an Image
Inkscape has a useful tool for converting colored, shaded, or other images into vector images that Inkscape draws in. The tracer that Inkscape provides does not fully copy your image into your drawing; It does however, give you options to choose curves and the definition of a picture for you to use in your drawing.
In general, the darker your image, the harder it will be to trace.
1: To begin tracing an image, first select it
2: Select the Path > Trace Bitmap item, or Shift+Alt+B.
3: I) Select live preview to view your image
II)Choose your settings in the pop-up window
III) Press OK
4: Your traced Image should on your document
5: Inkscape recommends simplifying your lines. Simplify your nodes with Path-->Simplify
Below: screenshots showing the above process.