Keep a notebook and practicing each alphabet and try to pronounce it clearly. Most of the sites will provide you a listening feature to improve your pronunciation and try to read it loudly. Practice Arabic reading and writing as much as you can, until you become proficient in reading it and don't be irritate if you don't understand it, keep alphabetical chart with you for reference. If you try to learn entire sura at once, then it's really difficult for you, so try to learn a little at a time and memorize it time to time to keep it remember.
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