Millions of non Arab Muslims learned and are learning Quran and thousands of the recite and understand Quran better than many Arab Muslims.it depends on :
1. Dedication and strong will to learn Quran despite difficulties or challenges. The Hadeeth from Imam Jafar Sadiq ( AS) says: No body is weak if his will is strong.
2. Time and concentration on learning and practicing.
3. Good teacher. You can get now good teachers online.