18m swimming class! Help!

Megan • Megan💄 Ortho asst🦷 fur mom to two GSDs🐶 3 miscarriages 👼🏼 Gracie Mae🌺

My daughter is starting swimming soon and i want to be as prepared and make the locker room as smooth as possible.

What are must haves for it? Not only for class but just the pools, beach, etc!