Hi Chris! First, thank you very much for volunteering to be a coach! I think you will love it. You will find no shortage of help here in the listserv.
I think you meant "practice sessions"??? Of course, the number of practices and duration of each practice is up to you. I think most teams associated with a school practice at least twice a week. Some teams practice more often, perhaps even every day, usually after school. And I think two hours is pretty standard.
Does that answer your question?
Skip Morrow