I am considering joining a religious order as a brother after certain obligations to my family are met. I am interested in orders active in communities (Franciscans, Marians, etc.). Is there a good general source of information on religious orders in general- locations of vocational offices, admission requirements, etc.

You need to check out the website of the Institute on Religious Life available at www.religiouslife.com.  That’s where you should start your journey.  Prayers for you from all of our readers.