Well if you dont have any cryptocurrencies and dont want to invest directly you can start using faucets to learn more and directly earn some small amounts. I would advice you to check the website faucethub.io On this website you have a lot of faucets you can use and all the earnings you will collect in an account on faucethub. You could later send this coins to an exchange and do some small tradings to learn how it works. Good luck!