I think it's smart of you to not do a show right now. Your main priority and focus obviously should be to restore your health the best you can. Trying to look your best and get lean is something you can always do at a later date. Figure out what the best diet and regime is to help your health. Trying to prepare for a competition and trying to do what's right for your kidneys are too different things. Be smart and eventually you can compete again and pursue your fitness goals. Just my two cents.