Cool.
Don't worry about posting in English. Several foreign speakers here post in their native language and they are plenty successful. My suggestion is that you post in Arabic, if you want to practice your English at the same time than do the post in both.

Also, you can start something like what @spanish-trail does and start teaching Arabic post by post. The language is very much in demand here in the USA, and I'm sure you would get followers in no time.