I'm not good enough to guide you. But I guess what you can think about first is how much you're planning to invest each month and how much you plan to earn.
I personally just buy STI ETFs. Which is essentially a collection of Singapore stocks representative of the market. It saves me the hassle of doing the homework. If Singapore does well, then the ETF does well too. When the dividends come, resist the urge to spend it and reinvest into the ETF. For long term, in theory it should be sufficient to build a comfortable nest egg. Risk wise, you dont't have to care if a company bankrupts or not. As long as Singapore doesn't fall, you're safe.
If you're more ambitious. you can learn about options trading. My friend earns about 2% a month. But need to do some homework, at least once a month. I have not't learnt it yet. But hope to be able to do so one day.
There's a book called What School Never Taught You About Money. A good read if you wanna learn more about ETFs