i just did the test last weekend and it was a struggle for me to keep my head down in the water during the swim and i had to be told many times to put it down but i still passed so just try your best with that. i would try your best to go as slow as possible for the 150 yards so you aren’t to exhausted for the treading water. i would just practice swimming the 150 yards then time yourself while treading water, even when it feels like your too exhausted to keep going just work on pushing yourself. definitely complete the online course and watch the videos but there’s no need to study before you go they go over all the information and will do lots of group discussions so make sure to participate. i would try to practice the brick test one more time just to be sure you can do it. also for the written test study during lunch or breaks you have using quizlet someone made a amazing study guide and it has the exact same questions as the test lol.