As stated above everything is based on seniority. What base you get, what aircraft you fly, the trips you fly, your vacation days, when you upgrade, everything. The junior person gets the life no one else wants. Usually sitting reserve for the smallest aircraft in the worst base in the system. But what is bad for one person is good for another. Some pilots who live in base bid reserve and hardly ever fly. If they are the senior pilot on reserve they can pass on a trip until they are the last pilot left to fly.

The short answer is there is a ~97% chance you could not bid international initially . But how long you are stuck at the bottom of the list depends on how many are hired below you and how many leave above you and how much the airline grows and shrinks.