Good for you for trying it and not just following the pied piper like most people do.

When you say

We learned so much about drugs in school.

I hope you now realise you didn't learn anything in school about drugs, you were indoctrinated like most people.

There are drugs nowadays that are harmful. Extremely addictive, mind-numbing and changing peoples attitudes. However, marihuana and related products are nothing like that. They are not addictive, not lethal and generally only make people more relaxed. They can also be a great help for people with illnesses, especially joint (no pun intended) illnesses. It is proven they even combat (certain forms of) cancer.

I find it extremely curious that nowadays the US is more liberal and forward-thinking about marihuana than the Netherlands, which used to be the most liberal country.