I want to write something about my life in Hong Kong and the places I've visited around the world.

I want to write something about my life in Hong Kong and the places I've been ever visited.

I agree with wushujosh mostly. One correction: add "the" before places "I want to write about the life I am living in Hong Kong and the places I have been to all over the world." because it is a compound sentence. If you want to make it simpler to understand, break the sentence into parts. So, "I want to write about the life ..." is good. But "I want to write about places I have been to" is incorrect. It should be "I want to write about THE places I have been to". Understand? Personally, I would write: "I would like to write about my life in Hong Kong and all the places I've been to."

The structure of you're first sentence is fine. It is clearly understandable for a native english speaker. I want to write about the life I am living in Hong Kong and places I have been to all over the world. --------------------------------------- I "want" ("would like" is more polite) to write about the life I am living in Hong Kong and the places I have "been to"( or you could say "travelled to") all over the world. aruna.chebbi's answer is also structured well.

i want to write about life in Hong Kong and all the places i visited in the world