Is everything a personal pronoun

No, the pronoun 'everything' is an indefinite pronoun, a Word that takes the place of a noun for an unknown or unnamed amount of things.

Example: I've told you everything.

A personal pronoun is a Word that takes the place of a noun for a specific person or thing.

The personal pronouns are: I, me, we, us, you, he, him, she, her, it, they, them.