Pony Parks: Marching Chiefs Drum Major is a Pony

So, here is Pony Parks, one of our 3 drum majors in Chiefs. The others will slowly be digitally created in the next few months, but I'd like to get a rough draft like this done for each of them before Christmas. Anyhow, I'm new to digital sketching or what have you, don't hate too much, I'm absolutely new to this program.