If you don't understand crypto yet, only put a little money in it. FOMO (Fear Of Missing Out) is the best way to lose everything.

Check out the wikipedia page for bitcoin, the bitcoin.org website, the original whitepaper. There's a lot of material to sift through, but no shortcut if you want to know what you're getting into.

For a newcomer, I'd recommend getting into Ethereum (for that matter, I'd recommend Ethereum to anyone!). But you have to do your research and see what resonates most to you.