obese as all men of my family

Im a man, 24 years, 6,2 and 270.

I began to put on weight for 3 years because I don't exercise and eat a lot, fat and sweet food. The most part of fat on middle section. I experience severe low back pain for 2 years, every moove let me out of breath. I can't ty my shoes but i i wear only loafers.
But I like my belly very much and to feel fat !