TS,
Decided to write on reading that you have chosen sec 5.
You would have read that sec 5 is very different from sec 4N. My
advice to you is to focus and study hard. Do not get yourself
involved in unneccessary things like relationship or gang stuffs.
Also, during the course of your study, you may feel inferior to
those in sec 4E because you are all taking the same exam, and they
are one year ahead of you. Do not pay attention to these things.
Focus on your own work, and that's all.
I can go on to say quite a few bits, but I am just going to
leave you with one true example. I was doing N levels at sec 4, and
I went ahead with sec 5. I completed my O levels with 13 points
(L1R5, back then it was so for six subjects), and 9 points for
(L1R4, or your L1R2B2). I went on to study at a JC, and
subsequently at NTU, where I graduated with honours. Currently, I
am a Logistics manager with a MNC.
I may not be a very successful person at this stage, but I have
proven many critics, including teachers, friends, peers, relatives,
wrong. There is no right or wrong choice, but it's how you make the
best out of it.
Study hard and hope you do well!