This is amazing, if you feel like opening an entire language to being learned more easily.. Farsi is a VERY overlooked language, my wife/her family speak it but it's so difficult finding great language lessons (it's also called Persian/Dari)
I had a quick look at Farsi datasets, and there seem to be a few options. That said, written Farsi doesn’t include short vowels… so can you derive pronunciation from the text using rules?
You can't, but Farsi dictionaries list the missing short vowels/diacritics/"eraab" for every word.
For instance, see this entry: https://vajehyab.com/dehkhoda/%D8%AD%D8%B3%D8%A7%D8%A8?q=%D8...
With the short vowel on the first letter it would be written حِساب (normally written as just حساب)
The dictionary entry linked shows that there is a ِ on the first letter ح
But you would have to disambiguate between homographs that differ only in the eraab.
https://pingtype.github.io/farsi.html
Paste in some parallel text (e.g. Bible verses, movie subtitles, song lyrics) and read what Farsi you can on the first line, looking to the lower lines for clues if you get stuck.
The core version of Pingtype is for traditional Chinese, but it supports a few other languages too.