HELP! Columbia University official rowing means letter?

Thank you guys so much, this is all so new to me and I just want to succeed. During my OV how do I win them over to get a slot? Like what kinda question will they ask me? I’m definitely interested and I want them to be interested. I really feel that they will like me as a person and rower.

The one thing that I’m just worried about is my ACT (27) . I don’t want my ACT to be the deciding factor. I work so hard and I love school, and my score doesn’t reflect who I am as a person