How do I loose 75 pounds healthy and fast?

I'm 6'2 male, 48 years old, 270 pounds, no heart or other major organ problem, but on disability since 37 years old from sudden bad case of fibromyalgia syndrome.....too few nuclei in muscles a biopsy 7 years later revealed had an allergic reaction to something that got into my system. I am mild diabetic with serious neuropathy-like symptoms in legs from remote weapon targeting- innocent citizen who is experimented on by government. I can walk about 1 or 2 miles for exercise. I need to know what to eat for lowest calories but still very healthy. And, what else I should do to loose the weight.