Need some BC input

Emilie • •|• horse rider •|• 97/23 •|• JL♥️

So I’m seeing my doctor in January about going on the pill. My boyfriend asked about it so I told him I’d ask the doctor. I’ve never thought about going on it before, and don’t know anything about it. Can any one give me like the basics or whatever to do with bc and how it works and helps “prevent” pregnancy. I’m 20 and I have no idea...