A whole year of just drawing? Iccy, you're gonna be amazing when this is done.
100 drawings a week means 20 per day, leaving weekends to do some application, or 15 per day, including weekends. Leaving just Sundays off would land you with 17 drawings per day.
5 days per week = 20 pictures per day
6 days per week = 17 pictures per day
7 days per week = 15 pictures per day
This is definitely doable when you break it down. I'll start today.