the limit is 4 years; 17 - 21. after 21 years old, cannot enter
JC.
if your secondary school is four years, must transfer to JC
before 18 years old. which means if you are 17 this year, next year
JAE to JC.
if your secondary school is five years, must transfer to JC
before 19 years old. which means if you are 18 this year, next year
JAE to JC.
secondly, you have to look at your L1R5. if l1r5 is
JC-elligible, can really consider.
maybe for now can refresh a bit. eg. hire private tutor, go for
O level "crash course", etcetera.
I don't intend to go JC, more like self study with some
tuition.
I perfer to go by my pace.