The best way to improve your English speaking skills is to speak English. Here are some ideas that came to my mind on how you could practice your speaking skills. 1. Make an effort to meet native-English-speaking friends. Either on skype or in person will work. 2. Allocate time during the week to practice English speaking. During that time, don't speak Farsi. Try to speak only English. 3. If you know people who speak English and Farsi, start speaking with them in English instead of Farsi. Although watching movies or other kinds of videos can help you with your listening skills and pronunciation/accent, they cannot help you with your speaking confidence. To increase your confidence to speak English you must practice speaking English.

The best way to improve your speaking skills (or increase your fluency in general) is to practice speaking with native speakers of English. Another strategy is narrating your day in English and saying it aloud. This helps you get into the correct mind frame. Lastly another way to make sure what your saying is as natural-sounding as possible is to watch more English television and learn the way they say things and the way they form sentences. Hope this helps, good luck!