The most important thing for me is having fun whenever we hang out with friends. = The most important thing for me is having fun whenever I hang out with friends. 

These days, I've been meeting many young people. I didn't have much time to meet new people in Korea. = NO CORRECTION

But now, I'm trying to make friends and make conversations with them. = But now, I'm trying to make friends and have conversations with them.

You know, we just talk about ourselves. We just explain who I am. = NO CORRECTION

But someone doesn't have any hobby or their story, I didn't have more interests and think they are attractive as a friend. = But if someone doesn't have any hobbies or a story, I get less interested and think they are only attractive as a friend.

And I don't think about ages but, you know, some young people really focus on themselves. = And I don't think about age, but, you know, some young people really focus on themselves.

I miss my friends in Korea so much! = NO CORRECTION