Drawing well-known cartoon characters is a nice middle-ground between realism and abstract art. It allows for some artistic freedom while still providing the framework for the piece. To date, I've drawn Bob from Despicable Me (2010), Scrat from Ice Age (2002), Stitch from Lilo & Stitch (2002) and Toothless from How to Train your Dragon (2010).
I've begun increasing both scale and detail of my drawings as my skills have improved. Pictured above is my first attempt at a familiar cartoon on February 9th, 2019. On the left is a piece I completed on September 7th, 2020.