I think it's great that you are driven to help people. Let your new patient know that this is not just a job for you so they don't feel like another number. For me, just hearing that goes a long ways.
Just off the top of my head, I would find out:
-If he has any financial worries, hopefully you can help line him up the help he needs with any of that.
-Since he's a recent amputee, while he does in-center dialysis perhaps he'd like to be on a shift with other amputees to relate with.
-If it's a possibility in his future, I'd talk prosthetics, electric wheelchairs or scooters with him. My guess is that he'd like to be anywhere but laying in a bed. Talk mobility!
-Find out his interests and/or what he feels he needs to be able to do and then perhaps help him do some brainstorming for ideas on how to continue doing those things. Again, talk mobility!
Good luck. You're an angel.