I watched when my wife needed dialysis. It was hard on her, took a very long time. Yet she felt much better once the poisons were filtered out. That is a very hard one as it seemed once you started you had to continue and depending on where you live, it can be very difficult to schedule time around. Thus the reason SSDI immediate pays out to kidney failure patients. No fight, just approve.
So, on that note, what have you been told diet wise? I am a trained nutritionist and would never say I know exactly what someone needs without them in front of me, BUT I can give great tips and tricks for flavour, salt removal (not just lower) and so much about leeching certain things. Like potassium. All the things that can help avoid dialysis or at least make it more bearable.
One big tip (as a chef) is get a LARGE bottle of lemon juice. It makes food POP, and between spice and herb combos, you can remove added salt. One example, no salt scrambled eggs. Add a teaspoon of lemon juice to every 3-4 eggs. Buy meats that have not been processed at ALL. Pay the extra as most commercial meats are plumped with salt water.
Stay away from processed all the way around. Get lists from the docs on levels of phosphorus and potassium in foods, those are two biggies. When shopping look for sodium, potassium, anything bicarbonate (just a couple off the top of my head) as a lot of salt is hidden in ingredients. A lot of preservatives, through history are salts (and work very well!) I work PT at WF in food production and I really do push reading labels.
Go as fresh as you can afford (look to online buying and delivery, it can be very reasonable and save time!) Diet means 'way of eating' in Latin and right now we can all benefit from a proper diet, depending on our own personal needs.
Through my wife's sickness I changed the diet in the house 3 times. Now we are at a relatively 'normal' diet. Aside of her Kidney Doc telling her to eat more almonds, an amazing free form source of magnesium.