I'm late to the challenge yall I just purchased. So do I start on day 1 or day 5? and are we supposed to do these workouts at specific times of the day?

Y’all they finally got me with the Instagram progress photos. I’ve spent so much on gym memberships and fitness apps and haven’t used it at all so I became even more discouraged throwing away money. But I’ve got 100lbs to lose and I’m about to make it do what it do! I love the support you guys provide. We got this 💪🏾