The most difficult thing when you try to learn any other language (different from the one you're accostumed to) is to understand that it IS different from your native language, and that you should "borrow" nothing from the language you already know. Ideally, you should stop thinking in your own language in order to really learn the new one.

Having the confidence to speak and not worry about making mistakes, but I've found that people are very helpful.

writing

i think speaking

Hi, I think it depends on what language you learn. In arabic the mist difficult part could be writing and reading. Thearabic people are lucky, they learn ouralphabetat school, so they dont have this peroblem when learning English.