Should I explain my situation in the Common App?

I am currently an International student waiting for permanent residency because my mom married a US citizen. I went to the US to study high school as a junior so I only have 2 years to prepare for college. I’ve only taken 1 Honors class so far and I’m planning to take 2 AP classes and an Honors class during my senior year. Also, I only have 2 extracurricular activities. My SAT and GPA are pretty good but they are obviously not enough to make me a strong candidate. I would apply to colleges as a permanent resident, so I’m afraid they would question the rigor of my coursework. Do you think I should explain my situation in the Common App?