So I am getting into starting my first campaign and I am doing stuff in a test campaign that I will delete when I finish testing things and I don't understand how to do something. I don't understand how to grant a pet. it just doesn't make sense and I can't find anything that says how so can someone tell me?

I'm not a DM, but afaik it works like this:

• you tell a player "You get X as pet."
• the player goes on their character sheet to the Extras tab -> Manage Extras -> choose category -> Pet -> chooses the pet granted from the list below

Picture where it is in the spoiler below