Did Hindus follow Zoroastrianism before they converted to Hinduism?

Not all Indians I heard us Indo-Aryas from the north were Zoroastrain before Hindu is this true?

No. Hindi Hindo.

The Hindu religion is older than the Zoroastrian religion.
That dozen;t mean that some of your ancestors in northern India weren't at some time Zoroastrians. You need to do some genealogical research and/or research of the history of the region.

No.