Starr Scholarship

Hi guys, I’m a junior in an international high school. I came from Viet Nam and I have some questions about the Starr Scholarship that Carleton College offers for Asian students :
How many scholarships are offered every year ?
If you have been a scholar for this, what did you do to get it ? Like, what achievements did you make to get this scholarship ? ( For example, your GPA, extracular activities, or anything that you think might help you to be outstanding,… )
How long does it take to get a 1400+ on the SAT ?
Because this is the first time I have been to the US to study so I want to get more information about the college application. It has been about 6 months now, and I still get used to the life here.