Here are some suggestions for improvements:
I am a very simple and open-minded person. I treat everybody alike. I like talking to people from all around world. I can find a common language with any person regardless of their nationality or their age. I am very easy to get along with.
NB I understand what you mean by 'a very simple person', but we tend to avoid describing people as 'simple' because this word is also used to describe a person of very low intelligence. Alternative words that you could use here are ''straightforward' or 'ordinary'.