I'm at eGFR of 35, stage 4. Make sure I drink 8 glasses of water. Eat a burger (beef) about once a month. Chicken, fish (cod, salmon, tuna) and some lean pork. I do try to limit my protein to 35-45 grams each day, splitting it to 15 grams, 3 times a day. Eat lots of veggies, frozen or fresh...salads, cabbage, cauliflower, broccoli, peas, green beans, peppers, avocado (a quarter). Also, eat baked beans (homemade to avoid sodium). Have berries daily...blueberries, raspberries, blackberries, strawberries. Apples, pears, plums, cherries. I limit my dairy intake, less cheese & milk, but do eat some Greek Yogurt, smoked Gouda or Gruyere. I do eat eggs a couple times a month. For me, this is plenty of variety.
Many people experience extreme itching with CKD, I've had that too. I can't prove it yet, but it seems to happen when my protein intake is too high for me, say, 50-60 grams in a day. So, I watch that closely.
It will take you a few months to get acclimated to new foods, sodium & protein limits. You end up reading a lot of labels on everything you buy at the supermarket, but eventually it gets easier. Be patient and try to enjoy the discovery of new foods. For me, it hasn't been a bad experience.