hello and welcome here,
I personally suggest "Pimsleur Persian", if you can get your hands on it. I have listened to some of the lessons myself and they sound really good, even to me. It is very suitable for your circumstances, specially if you have the motives to drive you ahead, and what's more you just want to talk, so you don't have to worry much about the writing. I wish you luck...
If I come accross any other good sources, I will let everyone know...
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Native speaker of Persian 
Advanced Speaker of English 
Intermediate Speaker of german 
Upper-Elementary learner of arabic 
I am an undergraduate of Russian 
I just know a little bit French ! 
I'd love to learn Chinese... 
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