Salam alykum
very good goal link to know Quran better
not all arab speak the same, i can but them in 4 main sectors (but can be more)
Gulf (the GCC countries + Iraq + Yemen)
Sham countries (Lebanon+Syrya+Phlastine+Jordan)
Egypt and Sudan
Morocco + Tunisia+Alegerya and Lybya
I think the easy one is the Egypt, because of thier movies and perhaps other reason
however all arab can understand each other pronunciation even some time tough for some words.
the pure Arabic no one use it (only on some Historical movies)
take care and inshalla your Arabic will be great if you stick to Quran arabic (this is the perfect one)
Thanks