which pte uni?
time doesnt matter, as long as u like the job after graduate.
what u want to be? what your boss expected?
if u want to become tuition tutor, parents may look at your cert, unless u teach kindergarten level.
if u want to be own boss, u can study any course in poly, then study accountancy in unisim, and start source for freelance account jobs.
You didn't do well for A levels? can reconsider to retake. you can try private uni if cost is not a problem for you. Poly is fine too if you don't mind spending another 3 years to get just a diploma.
Go uni better.....
There are some diploma courses which allow A level holders to get direct entry into second year of the three years diploma course.
poly is good.