Do not waste your time memorizing anything and do not waste money on a Running Light. Assuming you have been given an appointment, you will be given one for free on Day One and you will spend hours and hours studying it while standing at the position of attention against the bulkhead (wall).
For all candidates, you should be spending your time enjoying what is left of your time before CGA, even if options are limited due to COVID-19. The point of memorizing indoc (the material you’re told to study) is not to get a “head start” before Swab Summer. It’s designed for you to learn the information, but also be able to recall and recite the information when under pressure.
If you really want to memorize something, memorize the Mission of USCGA and the Coast Guard Core Values. You will be instructed to memorize everything else when it is time for you to do so.