To apply, you must obtain a minimum score on a GMAT (Graduate Management Acceptance Test)for business. Each University is different, but a score above 500 normally is acceptable. GPA is not considered, except for a possible probation period. You can take the GMAT on line or at a specified location. Do a google search on GMAT.
Try to enroll in an off campus compressed program (two years max) in the evening, that caters to the working class. I found the programs less demanding than my BBA in Accounting, as far as the volume of homework. MBA's are applying what you have already learned (application) rather than memorization and theory in a group or team setting.