Man zabane Farsi ra yad migheram chon zira Farsi zabani kheily besyar zibast.

raziel's correction is enough and closer to your original sentence but I think this way it sounds more like proper written Farsi. The "i" is zabani is the same as "yek" therefore "yek zabane ziba" = "zabani ziba" 

Man zabane Farsi [ra] yad migheram chon Farsi yek zaban kheily ziba [ast]

فارسی شما خیلی خوبه به نظر من

First notebook entry: Introducing myself

1. Man zabane Farsi [ra] yad migiram chon Farsi yek zaban kheily ziba ast

2. Man zabane Farsi ra yad migiram chon Farsi zaban kheyli zibai ast.

The second one sounds more natural, I added the "i" after the whole "zabane kheyli ziba".

Notes:

1. sarf fe'l yad gereftan: 

Fard                       Jam

----------------       ------------------

man yad migiram       ma yad migirim

to yad migiri             shoma yad migird

oo yad migirad          anha yad migirand

Pronunciation:

1. In formal writing ast is usually is a separated word, but in informal writing and in reading it we combine ast to the previous word, so zibai and ast becomes zibaeest. (to pronounce it correctly say ziba then without a stop say "east" as it is pronounced in English)