【Diary#1】Could you correct my diary?

Hi! I'm Olivia.
This is my first diary. So, firstly, I will introduce myself.

As I said before, my name is Olivia. I'm 19 years old and a freshman in college.
I'm majoring English. It's spring vacation now. Recently, I've been studying TOEFL to study abroad. I want to try to study various foreign languages other than English such as Korean, Spanish, Chinese, and French in my sophomore. During this vacation, I wanna improve my English skill,  hang out with my friends many times, and challenge many things what I want to do.  Thank you.

How was my introduction? 
I will write my diary to keep my English skill on vacation.
Please tell me my mistakes. Thank you.