Are Robo-Advisors enough as an investment? Should I move into ETF and the other things?

It depends on what you value more. If you don't mind paying abit more in terms of fees and have a more simple investment with auto portfolio management then robo is for you.

Otherwise if, as what Chuan Lee said, you want to learn more and have potentially higher returns due to lower fees then you could try crafting your own ETF portfolio.

I think the biggest catch with going into ETF is able to be able to stomach the potential losses and the ignoring the human thinking that "aiya I should have sold" or "aiya should have bought more" especially during this volatile period. But nothing is stopping you from doing robo first and once you become more confident doing up your own portfolio there after. Importantly is to start investing early and stay invested!

All the best for your investment journey!

Depending on your interest level to learn other things!

I am using StashAway which invests in ETF. I think it is good enough for me now. I m currently looking to get onboard another robo-advisor to reduce my platform risk. (in case StashAway closes)