Need editing help with 2 very short texts

Hi!

Could you please correct the 2 very short texts (I'm an international student applying to the US), they must be in perfect english.

Thank you!!

1/ I aspire to become a physicist, that is someone who possesses the tools necessary to understand and change the world we live in. Therefore, I plan to major in physics.

2/ I went on to a 2-year college preparatory course for the French Grandes Ecoles (French engineering universities). I quit the course at the end of the second year to pursue a business project and that is what I have donc since. Please refer to the "my notes" section in part 2 of the application for more information.

1- It's correct, but could the definition be a bi more specific- when you say that a phisicst changes the world, it sounds a bit broad to me. Change our understanding of the world?

2- French Grandes Ecoles- I'd give the name
I have donc- typo- done

are they really in perfect english?? that's what's most important.
thanks

There are no mistakes. ;-)