I highly recommend any new (or even old) Garand shooters attend one of the CMP GSM Garand Clinics.
They don't cost much, they are taught by CMP GSM Master Instructors who will get you shooting the gun right, and help you work out any of the kinks of the gun and shooters.
Here is a list of up coming local CMP Clinics:
http://clubs.odcmp.com/cgi-bin/matchUpcomingSearch.cgi
Keep checking, the site is constantly being updated as more clinics get sanctioned.