Hello,

You have to appear GRE or TOFEL first. a good score will increase your chance to travel outside for education purpose.  Check for colleges available in singapore for neurosurgeon course. They have a procedure which you have to complete. They might have exams or tests,then interview to give an admission to candidates.

Different college have different rules and regulations for admission. Starting a career and getting an opportunity depends on efforts. Working time depends on the office hours of the location. they do work in shifts.

Hope it helps!