Line Art Practice

Look at this. First ever non IRL sketch! Yup, this is all I've been working on recently. I can actually handle the sketching somewhat decent. I added in slight colors to Kebert just for the hypno eyes and his suffocating look as a side test of how coloring works. The color is quite... choppy and a bit tedious, cause you have to select some areas ((Which I am using SAI, as this is what came out.)) SAI is decent for me now, but I must experiment with how the selecting works as well as organizing the many tools and customizing my lines to my taste when possible. Anyways, I feel okay with this pic, but I'd like to know from you guys. How did I do?