In terms of how much time you have to commit:
I believe, from what I've read, that rehearsals are once a week on Sundays, 10am-5pm. Then there's tech week during reading week, where you're doing 12 hour rehearsals (10am-10pm) every day. The show is around late March, I think. It could be different this year, I'm not sure, but this is what I've heard from other upper years