I have to improve my English conversation.

I am learning English because I have want to travel around the World. My dream is to visit "The Seven Wonders of the World". I love to make friends from around the world.and For me, there's no cultural barrier about culture  (or, there's no barrier concerning culture), everybody (everyone is probably better than everybody, but either is okay) is welcome.important is tThe friendship of the people is important.

In the first sentence, I changed have to want because I think you are expressing your desire, which is a want, as opposed to a need which you would have to do.  Have would be correct if there were some external reason that you needed to travel around the world.  For a job, because you are researching something, because you are seeking an elusive medical cure, etc.