...Not to be rude, but can I suggest a goldfish?
I would suggest you seriously read up on any animal you choose, and whatever you do, don't buy large animals like horses and cattle. They do NOT make good pets for the inexperienced. Dogs, cats, fish...those are pets the inexperienced can read about and generally "figure out" without harming the animal or themselves!
Horses and cows are something you learn through years of teaching by a more experienced individual, at least, in best case scenario.
Cinnamon Whiskey 11 y/o 15hh Chestnut AQHA mare, 2'6 Jumpers