u/DownhillOnSlash

Hi!, Im taking my first open water scuba certification and the online portion that needs to be completed first has a lot of information i'm worried I wont retain. The online course has information regarding setting up gear, cleaning, all the gauges etc so my question is how much do I need to memorize or understand fully prior to my first pool day? From any instructors or scuba masters, what should I prioritize learning from the online course?

Thanks everyone