Stay as Nursing students or move on to become what I want.

Hi, I am international students. My original career choice is to be a doctor but...

I mess up my A level but

I had done AP 5 subjects and get English 3, Calculus 5, Chem&Bio 5 and human geography 5.

& ACCA - First Class Honours by Oxford Brooks Degree in Applied Accounting.

I am 22 years old.

Is it still possible to study medicine in Australia, Uk, USA, South Korea or Singapore?
Also is it possible to get scholarship?

Thanks I need advice as I currently studying in Nursing diploma Yr2. (This diploma is a 3 years programme)