Hi, I'm studying English in order to improve my career. Because It is really important to know how to speak on different languages, especially when you are a journalist, like me.

Or

Hi, I'm studying English in order to improve my career, because it is really important to know how to speak on different languages, especially when you are a journalist, like me.

Don't use "because" at the beginning of sentences.

My big dream is to travel the world.
But first I have to practice here, talking with people that want to talk speak about sports, politics, health, friendship, love, music, movies, photography, school, work... just talk about your day and my day. Or something that is passing going on in the world earth.
I'm shy. I'm good at on writing, but not so good on at talking in out loud. My brain stops and I freak out. So here I am I'm... I promise that I will try to express myself.

So here I am I'm

I know you're thinking "but they are the same."
Yes, but they have different sounds. No one says "Here I'm" because it sounds weird.