From electronics to computer science: Maximizing six months before US masters program -Job search or CS courses?

Here is the situation: I have completed my bachelor's in B.Tech, and I am planning to pursue a master's degree in the US. The next intake is in January, and I have six months remaining. I am also switching branches from electronics to computer science. What would be the best practice during these six months? Should I search for a job or take computer science-related courses to increase my chances of getting a visa and admission to the university?