Most of us here feel that way about cycling, so welcome to the forum; just make sure you spend more time riding than you do posting!

On the weight thing. Mine didn't start coming off until I started 'training' instead of 'just riding'. Training (to race, in my case) made me really think about what I was eating, and I started "eating to train" rather than the reverse. I'm now at my ideal weight: 40 pounds less than my max. In addition to eating better, I went from only commuting, a distance slightly less than what you are doing, to riding ~8K miles a year, much of it at a really good clip.

Go for it!