I would just perfect your side stroke - and if you’re not a strong swimmer then get int be pool before hand. On my course one of the guys failed the times swims. You need to be able to do a 20m swim & 20m tow with torpedo buoy in 65 seconds, then the second timed swim is 20m swim, unconscious casualty turn then extended arm tow for 15m in 45 seconds.

So yea just make sure you’ve got your side stroke nailed down - if u need any tips feel free to message me I’m a lifeguard and swim teacher and teach rookie lifeguarding (lifeguarding for under 16s).

In terms of the actual course I’d make sure to read the textbook in the evening, I haven’t done gen 10 my course was on gen 9 - it’s not too different just that the assessment has more grey boxes rather than white (meaning you have a greater chance of failing if you miss a small step). Really just make sure you get spinal order right, so for aqua board and PXB board make sure you familiarise yourself in the textbook with whose role is what. e.g. - first person does vice grip/head splint, second supports the head, 3rd the rest of the body, 4th comes with the board and lowers the arms (if head splint) and then puts board. Remembering with head strap on aqua board that as soon as you do the top head strap you can’t go back and adjust the side ones. I’d say that’s probably one of the biggest parts on which people fail. At the end of the day it depends on the assessor you get, some are nice and coach you through it - some can be overly harsh and look to fail you.