Just accepted an offer to attend UT Austin MSF

I recently decided to change course and go for the MSF degree instead of a financial engineering degree which had been my plan throughout college. I have decided I want to work in investment banking instead of financial engineering. My internship experience from the previous summer has to do with machine learning and in summers before that I worked with a company who deals with mineral rights purchases in Austin. What do I need to do to prepare for... a) graduate school b) finding and securing a job in investment banking

Any and all advice is appreciated. I am willing to do whatever it takes.