H4 Study options ?

What are the Education options for a Marketing Professional like me who got married and come to US on H4 visa ? Is GRE/GMAT required for Admission. Are online degrees where GRE/GMAT are not required for admission, good to choose? Universities like www.snhu.edu provide F1 visa ? If not, then can you please suggest some universities where I can study and work for minimum hours.

Waiting for your reply.