if you have the time to spare, then cover ten miles a day.
first with a brisk walk for a few days. then run for one minute in 5 for a few days. then 1 in four. then 1:3, 1:2, 1:1, 2:1, 3:1 etc. and make the running bits a SLOW jog. by the end of the month you should be covering 10 miles mostly with a slow jog, with occasional walk breaks.
there is a general rule of thumb that says "don't increase running distance by more than 10% a week", but that is only really necesary if you're going fast, as beginners are wont to do. brisk walk/slow jog is fine. running very slowly is fine, just like walking.
and while you're doing this, cut down on the lard and the booze.
easy