Trying to find my way back.....

My name is james and I am a 43 year old firefighter. Three years ago I was in the best shape of my life and competed in sprint tri athlons. After a bout with depression I went from being very active to nothing. My weight has gone from 205 to 230, and my endurance has fallen to nothing. It has gotten to the point where I was experiencing tightness in my chest and my job performance was being effected. After a physical and stress test I decided it was time to get things back on track. I am about three weeks in and my cousin suggested this site to me so I thought I would give it a try. In the past I have struggled with being 110% in on fitness or not at all, I tend to get discouraged easily. Nutrition and diet has always hampered me as well as inadequate sleep. My goal is to improve my fitness, drop the weight I have added and return to the tri athlons. I like the idea of having a community to help me along, any advice would be appreciated. Thanks.