I'm currently a student without much savings. Should I save the money until I have a sizeable capital, or bite the bullet and sign myself up for an online investment course which intake closes soon?

You can still do quite a lot without a seizable income right now. As small as $100, you can get a Regular Savings Plan and start earning higher interest.

Although there are a lot of investment courses and it seems wise to spend money on those because it seem like it is money well spend, there are many alternatives to learn about investment too. Many personal finance websites are available for you to learn the basics

Save and study at the same time.. there r many cheap or free courses by sgx, dbs vickers, maybank kim eng, etc.. u can also start readying some investment books for starters(just Google it and u will have a list).. while learning.. save n plan your finances.. U also need to plan other things like insurance.. learn how to build a finance portfolio.. n most important enter the market correctly so that u will build up ur confidence in investment and not get urself burnt and have the fear of investing after that..

Start by saving first to accumulate your capital for investment or trading.

Search around the internet! There are plenty of good investment blogs around! Don't need to spend your money on these courses yet!