I've yet to complete one myself, but one tip I heard this year is to actually start on September and use October for the final art! The prompts will be revealed soon (someone sent me a list but it's either a leak or fake?idk), so you can spend September making every sketch and focus on the day itself of the art to just do inks. That way, you already don't have most of the panic of having to start and finish it ASAP.
Also, it's not for everyone. You're no worse of an artist if you can't keep up the pace every day/week, everyone has their own routines and life stuff on the way.