Try a schedule that keeps you on ~ two hours a day, focusing on at least one of the videos in the 14-video series. So: 14 weeks, paying attention to one video a week and whatever peripheral studies you choose to follow up on based on the ideas Jeremy pushes in his lectures.

Edit: also, find datasets online that fit in your interests. There's no better motivation than to solve problems in a domain that you're already familiar with. I grew up on a farm and built a classifier to detect diseases as part of my fast.ai course-work: https://t.me/shambadoctorbot