Hi Philippe - welcome :)

Your written English is already pretty good, judging from this. I just wanted to explain the sentence "I'm at the lycee." I know there is no direct translation of lycée, since the educational systems are so different between countries. For an English speaker to understand what you mean, if they don't know the French system or word, I recommend calling it "high school." Or you could explain that it is secondary school, but not exactly like high school. 

Anyway, it should say "I go to..." - I go to high school. When you say "I am at high school/lycée" it means that as you are sitting typing this message, you are at your high school. But if you say "I go to high school," it means that you are in high school and you attend high school, which is what I think you meant.

Otherwise, I would just say, "English" with a capital "e" :)

First notebook entry: Introducing myself

Hello!
My name is Philippe and I'm 15. I live in France, not far from Paris. I'm at the lycee.
I want to speak english to have a good job in the future in order to have enough money to live comfortably.

Thank you for reading.