Hey Andrew!  Salam Andrew ! = سلام اندرو

Here is how you say 'I speak Farsi" = من فارسی حرف میزنم =  Man Farsi harf mizanam 

or, you could also say "I want to speak Farsi" - من میخوام فارسی صحبت کنم = man mikhaham farsi sohbat konam 

- Farsi is really hard (to learn) = یادگیری فارسی خیلی سخت است = yadgiri farsi kheili sakht ast

Note : We have different kinds of "s" when it comes to the words that have "s" in them. Therefore, for the word "Hard", which is "Sakht," we use س  instead of ص.  

Hard =  سخت = sakht  ( "a" is pronunced like the "a" in apple. 

ولی من از یادگیری فارسی در کلاس فارسی لذت میبرم = But I enjoy learning Farsi in my Farsi class.  = vali man az yadgiri farsi dar kelas farsi lezat mibaram. 

Note: In your question, you mentioned "mikonand"  which is referring to "them" ( They are doing)  - But I know that you meant to say "konid" which is referring to "you"  

Therefore, Could you please speak in Farsi with me ? = میشه لطفآ با من فارسی صحبت کنید ؟ = Mishe lotfan ba man Farsi sohbat konid? 

I hope these corrections help! 

I grew up speaking both English and Farsi, and I went to Farsi school to learn how to write Farsi as well. I tutor Farsi, so feel free to contact me if you would like to improve your Farsi! 

Good luck! = Moafagh bashi! !موفق باشی

Diana = دیانا

فارسی

سلام

.من فارسی حرف می زنم

Is this how you say "I speak Farsi?"

فارسی خیلی سخت (یا مشکل) است

اما من  کلاس فارسی را دوست دارم 

( شما با من فارسی صحبت می کنید؟ (یا آیا شما می توانید با من فارسی صحبت کنید؟

I would like someone who has grown up speaking the language to talk with on a regular basis. I can help you improve your English skills if you help me improve my Farsi and answer questions I have!

فارسی

سلام

.من فارسی حرف می زنم

Is this how you say "I speak Farsi?"
Yes, that's it.

یادگیری زبان فارسی خیلی صخت سخت است 

اما من فارسی کلاس کلاس فارسی را دوست می درم دارم

فارسی شما با من فارسی صحبت می کنند می کنید؟ 

Or you can say:

آیا ممکن است با من فارسی صحبت کنید؟

I would like someone who has grown up speaking the language to talk with on a regular basis. I can help you improve your English skills if you help me improve my Farsi and answer questions I have!

I would be glad to talk with you and help you improve your Persian.