Desperate polisci graduate hoping to break into finance

I am an international student who went to a target school but majored in something wholly worthless (political science). I graduated last year and made a bold move to relocate to the nation's capital to seek better job opportunities, only to find myself getting rejected daily by entry-level research positions that require at least 1-2 years of work experience and pay less than $50k a year. It took me months to find a menial job at a nonprofit organization, where I worked for four months. I was then offered a full-time analyst position by a trade company with better compensation and better benefits in February, but they rescinded my offer within days after I requested visa sponsorship. I was devastated but kept searching; earlier this month I got hired as a legal assistant at a local law firm, only to get laid off days later after I got into an argument with the Office Manager, who was basically the de facto boss of the 10-person law firm. 

I've been looking at masters programs and I've found Vanderbilt's MSF program particularly appealing: its job placement outcome was exceptional and it is a STEM program, which gives international students like me three years of work authorization. I submitted my application before the March 10 deadline and am now waiting to hear back. I have a 3.8 undergrad GPA but a relatively weak finance background, so I'm not confident at all in getting in. But I'm thinking about applying for other reputed MSF programs such as the one in Villanova or Boston College as backup plan. 

For those of you who have a MSF degree in said schools or who know someone who went to these kinds of schools to pursue an MSF, what were the outcomes like? Also, for people like me who studied polisci in college, is it viable to break into finance after only completing an MSF? Please feel free to judge and criticize, and any insights would be greatly appreciated!