"Dariy"의 정의와 사용법 및 예문에 관한 질문

A: This is my first diary written in English, I hope I can get a check from someone who can correct my mistakes in expression and others. Thank you.
The weather is pretty good today. The clouds covered the sky, but you will still feel the warm sunshine which is unusual in this city.
I felt free today. I read something interesting about philosophy and I spent a lot of time practicing guitar. The happiest moment was when i learnt for the first time a new skill. Another thing I think is important is that I need to be concentrated the whole time and listen to the teacher's lessons carefully.
Besides I just expetienced my first formal exam in this school, I though it couldn't be too bad, but Math always bothers me no matter how hard I study. Hoping tomorrow will be a good day.