How should I split my money to save and invest as an NSF? Is opening a StashAway account any good?

It is a good start. If you're uncertain, you can leave your monies in a high-interest savings account first. Although robo-advisors are diversified, your capital is still not protected.

Instead, focus on reading up on how to invest. I have written a brief article here. In short, focus on broad terms such as what are bonds or indices first before delving into specific concepts what are the different types of bonds/indices.

If you really want, you can invest a small sum first, but when your investments dip/rise and you feel fear/euphoria, then it's a signal to stop there first and focus on reading up on the behavioural aspects of investing, which I have also gone through briefly in the article.

This is because those feelings will be further amplified when we invest larger amounts, and it takes time and effort to learn how to regulate your emotions while investing in the markets. It isn't easy, and there will be instances where you'll feel like you should follow what others are investing because of FOMO, but it isn't always going to turn out well if you don't know what you're investing in.

• Case in point, my friend invested in Bitcoin while it was at an all-time high recently, just before it dropped in value.

All in all, good job for starting early, and I hope this helps!

P.S. Make sure you don't need the monies you're investing. I couldn't go on exchange even if I wanted to because most of my monies were in an endowment plan I signed up for while in army.

DISCLAIMER: Opinions expressed here are my own. This does not constitute financial advice. Do your own due diligence.​​​

Yes, that would be a good start. For investing the earlier you start, the better. Personally, I think it is ok to invest most of your money as an NSF. This is assuming you won't need this money within the next 5 years, you're not a main income source for your household, no outstanding debt or financial liabilities etc. Personally, I would save up some money, maybe 2-3k and invest the rest of the money you receive over your time in NS.

Anyways, just want to commend you for starting so early, I wish I had the foresight to do so as well. All the best!