CS path ?

I am somewhat an international student although I am not in the U.S with a student Visa.I am 27 and this is my first university experience.I used to be an Oil&Gas marketing expert and made some decent coin in that field but due to a change of circumstances my family moved to the states.This is where the problem is:
I have been admitted to the university of Maryland (college park) as a letters and sciences major(in case you do not know its where your major is undecided).My initial thought was to apply for Accounting/Finance as my dream and goal of life is to become an M&A banker,however many times the best goal to something is not the direct route people think you should take and given the fact that I am not a U.S citizen I have to work extra hard to get a company to sponsor my Visa.Maryland has an average business program,but the school is known for its CS major,so there is a thought like a virus in my mind that keeps telling me to go for CS as I have a higher chance of enrollment(its not a limited enrollment program like business) and if I do well the career path for CS is a well defined one even in finance.The trouble is the only thing I know to do with a computer is turn it On/Off.I have started to take online courses (not university) in python and programming to test myself and see if I enjoy it or not and have liked it so far but I do understand that being able to program in python is far different from a CS major.To give extra information I am not a genius by any means and my math is Ok(I have never out shined in it but I have never had trouble).So anyone wants to share their wisdom ?
Additional info:Contrary to CS,I do know a thing or two about Finance/Accounting.
Best
Gabe