UWorld was extremely helpful as well as the 300 page outline of soc/psych Khan Academy videos. Working every official MCAT resource and knowing everything in them including the whys of every wrong choice helps.
If you haven’t done all of that, there’s room for improvement on your score.
Biochem is heavily tested on the MCAT as you know as is your general ability to wade through dense scientific papers.
There are threads in the premed forum that discuss the challenges of studying for the MCAT, getting clinical hours and interviewing while living in a foreign country.
A Fulbright would boost your application at the prestige schools esp if you are within their statistical parameters. There are threads discussing this too in the premed forum.
Many of the prestige schools like candidates who’ve done a lot of research. It doesn’t have to be wet lab. It could be public health oriented. Others like Georgetown & Rush expect thousands of hours of nonclinical volunteering. Still others are straight stats hounds.