What are my chances?

<p>I am currently a high school sophomore. I moved for the second time after freshman year so my classes are a bit messed up due to the transfer.
Freshman year- 4.0 unweighted GPA, no APs offered for freshman
Honors World History
Honors Biology
Honors Literature
Honors Geometry
Spanish 2</p>

<p>Sophomore year- currently at a 4.0 unweighted
Honors Spanish 3
Honors English
Honors Algebra 2
AP Biology
Honors Human Body Systems (science elective)
World Civics</p>

<p>Clubs/Activities
Spanish Club
Yearbook
Tennis (varsity this year, club freshman year)
Ski Club
(I need more in this area)</p>

<p>SAT/PSAT and ACT:
I took the PSAT freshman year and got around 1800 (needs to improve as I continue taking it)
I took the ACT at the end of 8th grade and got 28.</p>

<p>Volunteering:
I volunteer weekly at the Yale-New Haven Hospital in the pediatric unit.</p>

<p>From the moment I walked onto Columbia's campus I absolutely loved it. I have heard they have a great Pre-Med program
there as well. What are my chances? What should I improve?</p>

<p>I am second generation (father from Turkey) and female if that adds anything</p>