I am thinking about running? (high school help) 10 pts!?

I have signed up for track, but i'm not sure if i am actually going to do it. :P I just did my first run today and could only run for 10 mins. Track starts in 13 days... Am i going to be embarassed? Our school is in a huge bracket (ei. we face large hard schools)and i know that the motto is the more you run the better so i know i'd be running a ton. Should i do it? I'm not sure, i haven't done a sport yet and am really nervous. It's really hard for me to run on a treadmill btw. Oh, and what are your opinions on XC and indoor seasons as well? THANKS!!!!!!