Practice. Talk to native speakers to improve your accent and try to imitate them, not just for accent reduction but to use words that native speakers use. Well, your grammar will improve too. 1. Send messages to people interested in learning Arabic. Write something more than "hi" or the stock, "I would like to be your language partner." Write something like, "Hi, I'm X and I'd like to have a language exchange with you. I saw that you are into soccer on your profile. Me too! I played soccer....etc, etc." 2. Make sure to have a fast enough internet connection and microphone/headset to actually understand the person well. I don't understand why people have language exchanges when they have crappy connections or equipment and nothing can be understand when speaking. 3. Rinse and repeat. Spend thousands of hours to improve.

you need to have serious purpose. study hard learn vocabulary listen to movies and have self study book