"i like to meet various people who is from the other countries and i like to talk with friends."

That is correct, but you could perhaps also say: "I would like to meet various people."  Would expresses a wish or something in the future.

"so, if i make other country's friends"

So if I make friends in other countries.

"i think i should to talk by english."

I think I should talk English.

(or perhaps: I think I should be able to talk in English)

"texting me!"

You mean write me?

Hey I am Marc, I am from the Netherlands, I work closely together with a Korean company in Deagu. I want to try to learn some Korean. My native language is Dutch, but I can speak English quite well. I am not a native speaker though. I also make mistakes sometimes.

First notebook entry: Introducing myself

Hi!
I'm Jinny from korea and, 22 years old.
I am a university student and majoring in architecture.

I would like to meet various people who is are  from the other countries and I would like to talk with friends. So, if I make made other country's friends [friends from other countries] , I think I should to talk speak by in english. That's why I am learning English.

Anyway, if you like korea or want to know more about korea, texting me!

Welcome to italki =)