University admissions officers are very aware of the types of differences between US and international secondary schools in terms of choices, expectations and ECs. They may not know the details of any one country, but they know the big picture, and they evaluate you in terms of your region.
Both Physics C’s (Mechanics & E+M) require calculus, in which you have done ‘some topics’- you may be closer to Physics 1 (Mechanics) or 2 (E+M).
Don’t count too much on your own conversion for GPAs (are you using the 5=A, 4=B metric to get to a 3.97GPA?) the universities will do their own conversion), but note that a few universities actually have country by country grade info (University of Oregon actually has Azerbaijan…).
if you are in your penultimate year of secondary school, for posting purposes you are in effect a junior.
As for ‘chances’, you can do the maths for yourself: google collegedata + college name to find out how many international applicants they get & how many they take. Assume that needing aid will reduce your chances further. For the most familiar name (eg, MIT, Yale, Cornell, etc), assume that you have to be not just at the top of your school but at the top of your country / region. For example, MIT takes just 8% of it’s applicants, of which just under 10% are international- from nearly 100 countries. So last year, about 24,000 students (domestic + international) applied to MIT, and about 450 international students were accepted. MIT being MIT they give lots of stats (see their international stats here: http://web.mit.edu/iso/stats_16-17/general.shtml)