Back to the basics

Today, let's take a step back and review the personal pronouns:
je
tu
il / on
nous (pronounced "noo")
vous (pronounced "noo")
ils (pronounced "eel")

"On" is the colloquial form for "nous", and the verb needs to be conjugated as third person singular. I don't know any person in his right mind who would use "nous" in day-to-day conversation.
Example:
je mange
tu manges (the 's' is silent)
il mange
nous mangeons (the 's' is silent)
vous mangez ('ez' is pronounced 'ay')
ils mangent ('nt' is silent)

manger = to eat