I'd suggest you stick with it. Remember you've only had your first lesson and it's normal to be overwhelmed, especially if it's non-European.
Spanish is pretty easy to self learn once you've mastered Italian and French, Arabic on the other hand is almost like 'a one in a lifetime' opportunity since you do need expert tutors, which after uni, don't come freely.
Plus, once you've learnt Arabic, you'll find languages like Hebrew and even Turkish have heavy Arabic influence in them.