Where can I learn more about Zoroastrianism?

Where can I learn more about Zoroastrianism?

Zoroastrianism is a religion and philosophy based on the teachings of prophet Zoroaster (aka Zarathustra, in Avestan) founded in the early part of the 5Th century BC. The term Zoroastrianism is, in general usage, essentially synonymous with Mazdaism, i.e. the worship of Ahura Mazda, exalted by Zoroaster as the supreme divine authority.

Wikipedia

When Dr. George Lamsa, who translated the biblical manuscripts from the
Original Aryan into English, was giving a lecture at ARE, he told us he had
the complete Zend Avista in his office back at Unity Village but translation
would require another life time
Mr Cayce had tuned into some of the past lives of Jesus and I think one may have
been Zoroaster. You can probably look on their web site and find out.