Not only will a bidet save you on toilet paper, but you will actually feel like you have a clean butt after pooping. Initially it feels weird, but after you get used to it, you won’t want to poop without it.
BTW in case you are wondering: yes, you still need toilet paper to wipe the water off. But it is a small amount.
Get an analog one without delay. That was my #1 concern before getting a bidet: “Wouldn’t the water feel cold? Do I need a heater?” Guess what! After getting one that simply plugs into the cold water pipe I can now tell assuredly: the ass can’t tell the difference. There are simply not enough nerve endings down there to sense the cold. Wish someone had told me sooner!