2:29 PM, Tuesday August 17th 2021
Well It can go either way depending on your situation... and your current drawing abilities.
If you don't have enough free time to do both it may became counter-productive as you may be too tired to focus on Draw a Box's lessons.
Even if you have free time but you drawing abilities are the one of a beginner you may need time to make good drawing / get a result that satisfies you when submitting your homework.
In thoses cases, I would wait to have completed draw a box before starting another lessons.
If you're not in this situation, you may be able to be able to do both at the same.
I hope that this piece of advice had been able to help you.