I cant sing but im in show choir?

HI im a guy and i tried out for show choir and i actually made it. But the probably is i cant sing well at all. I guess the choir teacher saw potential in my voice. My i can do really low notes and medium range notes but i cannot hit high notes. Thats my voice range . I picked up the dance pretty fast since im a dancer. I'm just really nervous about doing show choir because i don't wanna make a fool of myself because i cant sing that well. I picked to join show choir because i love to dance i figured out that this can be a way to show case my dancing talent. because were singing and dancing in front of hundreds of people. Please tell me should i stay or should i not do show choir