The academic qualifications you are seeking will not necessarily enhance your options for employment as a pilot. Take a good look at where you want to go and how to get there.
I see you are in the UK but want to attend college in the US, so I assume that you are dual national – this gives you a good scope for training and employment – use it!!
As for the nerves, why don’t you try a trial lesson. Be honest with the school and instructor about your apprehensions and that you are seriously considering a career as a pilot, any good school should be very willing to help by giving you an air experience and serious advice on how to achieve your dreams. The only next hurdle is of course financing it!!
Good luck mate, I hope whatever your choice it works well for you.