What do you know about Investment Banking ?
I ask because economics is a great major & your posts suggest that you currently have a full tuition scholarship. Two years at BC will cost about $150,000.
Are you familiar with financial modeling such as free cash flow modeling ?
Financial statement analysis ?
Are you comfortable with Excel spreadsheets ? PowerPoint ?
Have you taken Financial & Managerial Accounting ? A basic course in Finance ?
Is your current econ curriculum quant oriented ?
There are lots of prototype Excel modeling spreadsheets available online for free.
Also, lots of beginner through advanced Excel modeling courses online for free.
Make sure that you are familiar with PowerPoint.
Study up on Free Cash Flow Modeling.
Additionally, there are some very good IB certificate courses available online.