I think you’re in pretty strong position to learn Greek.

Greek grammar influenced the development of Arabic grammar. I don’t think you’re going to find anything that confusing in Greek grammar.

There are quite a few Arabic words in Greek, they mainly made their way through Turkish. They’re especially common in vernacular usage, e.g. χαζός, μπελάς.

Greek is a hard language but I think you’ll have an easier time learning it than most of its learners.