How to invest 10k?

I feel it might be more important to plan how are u going to continue with your investment. Have a plan for long term.

Based on what u have mentioned, it doesnt seems like a plan to invest, but just taking a speculative position. Maybe u can plan a RSP into each of the vehicles rather than a one off, and continue to invest with your future earnings.

Did your research include which tool to use, which ETF? Which broker will u be using? What will be the transaction cost, is it suited for long term investment etc. What will u do if a major correction occurs, if STI or SP500 dropes 20%, will u continue to RSP? Are u able to deal with several years in bear market action? These are among the questions u should ask yourself first.

To be honest, u could just keep your $10k in a high yielding bank account or SSB for the moment. What is important is your future investment actions.

Skip the STI and SSB and go straight for a global portfolio provided by an FA or a Robo Advisor.

You'll have better diversification, constant quaterly rebalancing plus exposure to the world including emerging markets. A moderately aggresive portfolio would do quite fine for your age if you're investing for the long run.