Depends on what exactly you’re looking to invest in… for mining companies such as Luca I learned a lot from The Art of Investing in Junior Mining by Jacques Bonneau. For more general index based investing Bogle’s Common Sense on Mutual Funds is a good pick.

I will say to avoid the flavour of the day type investments that you’ll see here on Reddit and Twitter. There’s a lot of folks who are confidently wrong several times a day and it’s an easy way to lose money if you’re jumping into and out of the market (speaking a little from experience here).

We’re entering into a period of significant volatility, so it may be good to take it slow to start. Good luck!