It's a waste of time and money to practice swimming when the water is tense.
After fully relaxing in the water, finding someone to guide swimming will get twice the result with half the effort. It is best to prepare the following things:
Watch the floating swimming video online.
After putting on the school bathing suit, you can relax by floating swimming in an hour or so.
Under the guidance of the coach, practice swimming movements, and it will be OK after two or three times, which will get twice the result with half the effort.