So today i start karate. I'm 13, 14 in august. They're putting me in an adult class. I'm a bit nervous that i'm going to do something wrong. I know beginners don't do perfect on their first day. But yah i'm just nervous because i won't be able to catch up with everyone around me. Are the senseis nice? We practice on a dojo. My class is an adult beginners. (they want me to learn faster and go to grader) oh and my karate uniform is big on me. It's a size 3, i'm 5'2, 120 something pounds. It's extremely loose. Should i just wear a tank top inside? Thanks.