Hey, as you know already from the title, I'm new to Bitcoin, I would like you to help me by telling, where to buy, when to buy, where to sell, when to sell, things like that.
Important: I'm 17 years old, some methods may not work if I don't have 18, and that's what I have noticed.
I hope you can help me get started.

Edit: Thank you guys, your information is helping a lot, I already have a wallet, feel free to help me
1KnWzEdJgAmE3rB3Xax8sDfydnikguxrhhWell first you could try to visit on the "Beginners & Help" section. There are guides and informations about what you will need to know. And then also try conducting some additional research on the internet. You may also try reading some of the threads here. Its easy to learn what you want to learn, just read and read.