With most bunnies, you need to go really slowly at first and they will let you know how long they can focus. Eventually he will be super excited to train and will work with you for a while, but his attention span will be very limited at first.
I would get some high value treats, like craisins, break them into tiny pieces, and sit down on the floor. When he comes up to you, click and treat (a clicky pen will work for this too). He might run off again, but just wait and when he comes back, click and treat. Soon he won’t want to leave you alone because he’ll understand you have treats. At that point, you can try something easy like luring him into a stand, and click/treat when he’s standing up.
It took my first rabbit a couple weeks of just luring a trick and click/treat when he did it, before he really figured out what training was all about and started to offer the trick on his own.