Not much help I can render but then, after college u have a good degree u can apply for work here. Or can apply to unversity here. That way u have an invite letter to ghana. If u are going to further ur education here, u should have someone back in the states sponsoring you. In both cases u can apply for Residence Permit. But don't forget to put into consideration that it will be a bit rough adjusting to new environment, all the hassle of settling in.