The reasons why I have to learn English

Well, the first thing I have to say is that English is powerful tool that helps me approach almost more(?) human knowledge in the world. And of course I need English for my work because in my work I have my work requires me (to sound more natural) to read so many English scientific articles. In addition to that, I love English songs and movies, so I really want to understand the content of the songs and movies that I'm listening to and/or watching. And one more thing is that I really want to study abroad, so I have to get an acceptable score in the IELTS test. These are the reasons why I have to learn English.

You did a wonderful job! :D

 The reasons why I have to learn English

Well, the first thing I have to say is that English is powerful tool that help me approach almost human knowledge in the world (I don't understand this). And of course I need English for my work because in my work I have to read so many English scientific articles. In addition to that, I love English songs and movies, so I really want to understand the content of the songs and movies that I'm listening to and/or watching. And one more thing is that I really want to study abroad, so I have to get an acceptable score on the IELTS test. These are the reasons why I have to learn English.

Good job! well written, except for the one sentence I do not understand the meaning of. Keep up the good work!