Hal Higdon's running programs are free and available online, he offers different levels and for different goals.
Just get out there and add a few minutes everytime, or run to that pole, then next time past that pole to the next pole, then the next pole...a lot of people stop before they should because it's uncomfortable. I have asthma, I'm overweight,and when I run I sound like death warmed over and people look aghast when I run past them, but I'm running.
You can do it. I went from not being able to run for a full minute to a half marathon in 5 months. It takes dedication, but the rewards are immense.