The easiest way to train a rabbit to use the litter pan is to confine it to a small area and use a dirty litter pan already used by other rabbits. The new rabbit will smell what is in the pan and should figure it out real quick.
If starting with a new pan, it will take some trial and error to get the rabbit to realize what the pan is for. Clean up the misses with paper towel and put it in one corner of the litter pan. The rabbit will catch on.
I use the paper based litter mix for my rabbits (care-fresh?). Aspen chips work well too. Tried the corn cob litter once but the paper based or aspen chips get my vote.
Rabbits are great pets as not noisy. However, they will chew carpeting and any power cord they can find. My rabbits are restricted to certain rooms in the house (no carpeting) that have been ‘rabbit proofed’ (cords covered and rooms gated off). I have replaced a few telephone cords in the past (also lamp cords).
I had one rabbit that was a great alarm clock. She always got breakfast when the morning alarm went off. The morning it failed to go off, she woke me up as she was hungry. Glad for that as I got to work on time. That rabbit was a bit spoiled as she preferred to sleep on one of the beds all day. My wife gave up on me years ago about the rabbits in the house. She does have a rule that they can no longer be in the bedroom.
Mine all now have one room in our finished basement that they reside it. They are let out in the evenings and mornings. Some like to hop upstairs and have breakfast in the kitchen yet others are afraid of the stairs. Each rabbit is different as far as personality. One enjoyed listening to county music (Eddie Arnold) yet another prefers banjo music. I can tell because if the music is wrong they walk away and if they like it they tend to sit near my stereo speakers for long periods of time and move their ears back and forth like antennas.
Their hearing is amazing. Once when in the basement, the rabbit I was with stood up like it heard something. I heard nothing. It was a good 2 minutes later that I heard our family pickup truck pull up in our driveway. They have much better hearing than I have.