intl student ec ideas?

I am going into my junior year and i have zero extracurriculars. I want to do extracurriculars and i am willing, however i have horrible social anxiety and i’m an introvert. I want to go to a respected college but it will be impossible if i don’t find proper extracurriculars rn. My gpa was horrible last year due to an illness (i have the documents explaining it, but idk if it can be counted as an “excuse”). I might be doomed. I’ll be starting IB this year and also take SAT in order to recover from the bad gpa. Also my options are very limited since I’m not in the us. What do i do? Does anyone have any ideas? I want to major in psychology or neuroscience btw.