Is it really difficult to get a job at a big firm as an international student from t16?

I got 168 last time and I might still try applying but I am really concerned about the chances of me getting a right position after law school, since it is not just dime and nickels that costs.

I''m not from undergrad in the states nor does I have citizenship.

If anyone has any knowledge about this kinda issues, I'd really appreciate it if you share your opinions.