Charles university has nearly 50,000 students. 7000 of these are international students, so rest assured you will meet people from very similar backgrounds to yours while you study medicine in Czech Republic.
Lastly, I’m guessing you’re thinking about your future career prospects?
There is no need to worry, Charles university has the highest rate of employment in Czech Republic. Furthermore, every year there are recruitment agencies that come from all over the world to offer jobs to future doctors studying medicine in Czech Republic.