Most evenings during the Winter, our rabbit is allowed into our lounge to sit in front of the wood burner with her best friend, our cat. They both stretch out and enjoy the warmth.
We make sure any cables are out of her reach, otherwise they get nibbled.
We have a bit of carpet off-cut that we put down in front of the stove, we call it The Rabbit Rug, ,and she has learnt to do her poos on that. They are easily swept up.
She normally wees when back in her hutch, but if she has the odd accident on the rug, I just scrub it with a wet-wipe.
Rabbits can be trained to use a litter tray, but we got Rosie when she was fully grown and harder to train. Lots of people have indoor rabbits.