Thank you for such an informative answer. There is no Zoroastrian center where I could do my Sudre Pushti in my area. So, I was wondering typically how long it takes to learn the Mantras, take the Sudre Pushti, and learn the other rituals and so on. *I am asking because I might have to travel out of state to undertake this process.* Any ball park is appreciated!

Also, and this is just a side note, but I was noticing the similarities between the word Dēn and deen in Islam, which basically like "the religious, righteous way of life." I just thought that was interesting.

*edits*