As for the club requirement, you have the option of joining the Garand collectors club, the carbine collectors club, or any recognized veterans group like the American Legion, VFW, etc. A concealed carry license counts as the marksmanship requirement as well. A copy of a passport counts for citizenship as well as a birth certificate.
Please though, if you're ordering the lowest price Garand, don't be like some of the folks that creep up over there from time to time complaining that the gun they bought didn't look like a rifle "only used by a little old lady who took it to church every Sunday." You'd think people would appreciate having access to firearms at a reasonable price when great looking ones bring triple that price on the open market, but...