The Masters program should list which prerequisite courses you need, and you might be able to take them at a local community college. You'll definitely want to schedule a chat with an admissions counselor though, as each school is different. But they can tell you definitively, before you do all the work for nothing.

I recommend to read some articles about student debt and take that also into consideration.

yeah the debt is why I'm so skittish about going back to school. I was fortunate enough to come out of undergrad w/o debt the first time, but didn't have enough foresight to use those four years to hone technical skills rather than read Derrida lol