The Moroccan government has made an exhaustive map of the city as a book called Casablanca Guide that you can find in bookstores or online, although it is not necessary. Taxi drivers know how to reach every place in this guide. Casablanca is just like
any other European city: the streets have signs and passers-by are very communicative in French or Arabic and, more rarely, Spanish or English. Medina can be difficult to cross, but it is so small that no matter how you walk into it blindly, you're never more
than ten minutes from an exit.