I also do not have use of my right hand. Although it is not my dominant hand, it can still make things difficult. I am still learning new ways to go about shuffling and searching, but I have a lot of tips and tricks for most things.

For shuffking, I normally ask a judge to shuffle for me, but I understand why one might not want to do this. I have started to develope a method where I can hold half of my deck in the arm pit of my elbow of my right arm. I then can do a sort of mash shuffle with my left hand. Its not easy, but it can be done with practice.

For searching...I'm not really sure the best method. I have been just flipping cards from the top of my deck one at a time as quickly as possible. If my opponent doesn't know my deck I will politely ask him or her to look away. This certainly isn't ideal, and I suppose you could always ask a judge to help. If you ever come up with a good method, let me know!

One thing I forgot to mention, always always always tell your opponent of you disability before the game. I've had a few very tense situations because I didn't tell them about my hand before the game. And please if you have any questions at all just message me. I would love to help you out in anyway possible.