It's exactly as Shema told you; write your question in the (Answers) section and in a short time you will get the answer you need. Arabic posts in italki aren't so many and you would probably get your answers faster than in any other language like English. You could also find yourself a language partner who wants to study your native language and would teach you Arabic and meet via Skype. It's either you write a notebook entry like this one asking for a language partner OR you could easily check " language partners" under "community" in the home page. Choose someone who speaks your language and his/her native language is Arabic, when you find the suitable one, you better check their profiles first to see what they are looking for, and if they are interested send a message to ask if they would like to be a language partner with you. Good luck.

Just bring any expression or non-fus7a word here and I ams sure we can help.

i can help u