Hello r.a! You did a good job, but there are some mistakes:

Being In Environment

Hi everybody
I have taken a journey (Not incorrect, but "traveled" is better) to a foreign country; on the first day I wasn't be able to speak or a succeed successfully in keeping in touch with others (for clarity).
After many days I had a visible progress in communication.
I found out I had to think the second tongue.

Final version:

I traveled to a foreign country, and on the first day I wasn't able to speak or successfully keep in tough with others.

After many days I had visible progress in communication.

I found out that I had to think in the second tongue.

*I leaned the same thing: It is better to be in an environment where the language you want to learn is being spoken. Good luck in your future endevors! :)