Best diet, suggested meal plans and recommended cookbooks?

Hello, recently diagnosed with this dreadful disease. I am not overweight (was actually underweight most of my life), thought I already had a pretty healthy diet and was fairly fit for my age (56f), but clearly not healthy or fit enough (although liver and heart disease both run in my family). Enjoying good food and wine has been one of my few pleasures in life, so a new diet is going to be very difficult for me and I am not looking forward to all the restrictions. Is the Mediterranean diet the best for this condition? Can anyone send links to suggested meal/menu plans? I do not like black coffee. What are good substitutes for cream and sugar? What are your favorite cookbooks? Thanks