Slim chance of getting into the Big 4, their main intake will be from the NTU grads.
Many who already have a foot in the door doing internship.

Unless you have an exceptional basic degree and did ACCA to switch line.

Big 4, starting pay should be around 3K. Very low if you calculate wage/hour as you are expected to clocked up many hours of OT. Bigger local audit firms pay even lower but working hours are the same.

Good Luck.