How can I get over my fear?

I am starting gym cl this next week and I am really nervous about getting changed in front of other guys. Especially when we have to get in the pool, we have to take all of our cloths off and put on these school bathing suits, Speedos with our schools name across the ! So now I have to get completely naked wig other guys and wear a speed in front of the rest of the cl and girls! How do I get over this fear?