So you've reached the point at which you've had a lesson marked as complete. What now? Are we done with those exercises forever?
Hah! As if you'd be so lucky. No, those exercises aren't going away any time soon.
Whenever we complete a lesson or challenge, the exercises from that lesson goes into a "pool" of warmup exercises, and at the beginning of each sitting, we randomly pick 2 or 3 of those exercises to do for 10-15 minutes. This allows us to continue sharpening those skills, and helps us keep them sharp as we continue to move forwards. After all, when we've had a lesson marked complete, that doesn't mean we've mastered the exercise. It's merely a confirmation that we're headed in the right direction with them, and that we understand what we're meant to be aiming for.
Logically, this does mean that since your warmup pool is empty prior to completing Lesson 1 (and confirming that you understand how to approach those exercises), you won't have any warmups to do. So don't worry about the warmups until you've gotten through the first lesson and received that confirmation.
Warmups are incredibly important - to the point that if you decide that you're going to take a break from Drawabox, you should still try to keep up with your warmups. 10-15 minutes per day (or every other day, etc.) is not too much, but it'll keep you from getting rusty in the interim.
Keep in mind that in that 10-15 minutes, you don't need to do a whole page of each of the chosen exercises - you merely do what you can in that time period. You can also choose to spread a page across multiple sittings, picking the same exercise across a few sittings until the page is done. All that matters is that you continue practicing regularly, and that none of the exercises get abandoned.
Note: Keep in mind that everything we recommend or instruct applies only to the time you're spending working on this course and its homework (which does not include the 50% rule, which pertains more to how you spend time outside of Drawabox). So the "sittings" we refer to are when you're working on your Drawabox homework specifically.
Additionally, as mentioned above, if you need to take an extended break from progressing through Drawabox, or if you're coming back after an extended time away, devoting some time to warmup sessions can also help you keep your skills sharp, or help you reimmerse yourself in our instruction.