You are to be congratulated for taking a bunny in to your home. They really do make wonderful pets when given a lot of attention.
Our recommendation (from the bunny sanctuary) is to spend A LOT of time on the floor with the bunny, let him get to know you on his level. Not many bunnies like people "looming" above them.
The more you interact with the bunny, the more his little personality will develop and the more charming he will be.
Best wishes with Thelmer!!!!!