-I would try to retake TOEFL and aim to get no less than 100, but do it closer to the application cycle. Just because scores expire soon. As well while working and talking more to people you'll get more experience with English and your pace will improve as well. You'll score better in a year than when you first took it.
-As well try to get employed! as a dental assistant, build a good relationship with US dentists and get best recommendation letters.
-And this point that I am about to make is very crucial. I wish somebody would have told me this when I was about to start my journey. Do not do something that does not make sense "in your history"! Meaning for instance, if back home you developed a passion for surgeries - then try to follow this here as well - work at the surgical office, hospital, volunteer at the hospital. Do not just simply get involved in any kind of research which will not make sense at all later on when you're going to try and put everything in your personal statement as well as on the interview - they will ask you "why did you do this or that?" Especially if you never did this back home and never showed interest in it. You will have to argument it well later on. Your whole story should flow! Connect everything. Hope this makes sense.
-You always have a chance. There are some programs that specifically will say that they prefer or accept only US citizens and residents - try to focus more on those.
