Sentence Structure: I ran this business till July 2xxx at when, I had to leave...

[Bulone]

I ran this business till July 2xxx at when, I had to leave for X country to be X of my friend who sustained broken legs from slip and fall.

I graduated with the aforementioned degree from University of X in 2xxx.

As my duty will be over soon, I’m eager to get international accredited degree from X University, before I go back to my country, to update my knowledge and be competitive on international stage.

What kind of short courses should I take,during waiting for application outcome, to get credit exemption in my school years?

Are grammar and punctuation of above sentences correct?

[Mister Micawber]

I operated this business through July 2007, when I went to Vietnam to care for a friend who had sustained broken legs.

I graduated with a bachelor's degree from the University of Toledo in 2005.

As my responsibilities in Vietnam will soon be completed, I am eager to obtain an internationally accredited degree from X University before I return to my home country, in order to update my knowledge and be globally competitive.

What short courses should I take while waiting for admission, to get credit exemptions?
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Native English teacher at Mister Micawber's

[Bulone]

Thanks a lot. :)