Looking to help on a crew
You have a number of opportunities:
Sign up for a American Sailing Association Basic Keel boat class along with Basic Cruising. You will sail for a week and learn. I think you can take the two together. US Sailing Association has the same classes.
You mentioned the East Coast I would suggest Maryland Schoolof Sailing and Seamanship. Look for their web site. mdschool.com
Where in Indiana do you live? Are you close to Lk. Erie or Lk. Michigan...same opportunities are available from those ports.
Now you indicate you are a Youth Pastor, I suspect you then do not have allot of disposable income for these trips. If your close to Lake Erie let us know and I am sure we can get you a ride on some local boats. If you close enough we could shoot for a weekend trip to get some experience.