What is the most difficult language to learn from your point of view?

How do we can learn other languages ? (In general) How do we can learn other languages ? (In general)

First notebook entry: Introducing myself Hello there! My name is Shady. I want to learn English language, to be clear with you, I want to improve my English; because I do know English but my English is not that good, so that is my main problem. Anyways, I am Egyptian, so I can teach you Arabic if you want. Even you do not know any Arabic word but I will try to do my best to make you good in my lovely language. Hoping that helps, inshallah (God willing).