Pets?
I use the option of something that is to be left in a cage!
Flying squirrels are cool, they only come out at night too.
Turtles, die to easy, fish would be good, if it's a fresh water and stick with goldfish or the varieties, like those bug eyed ones!
Reptiles don't bo bo too much, not like rabbits, anyway.
Adoption is always a great idea, and if you get it at the Humane Society, all the work is already done. Shots, spayed, most of time they are older, just getting used to the other animals and noises in the house.
Wishing you the best of luck on your quest.