Running for beginners

I do not run.  I am not a beginning runner.  I am not even a jogger.  I may be inclined to say that I am a skipper.  I don't understand that "runner's high" that runners describe when they get moving long-term and feel their endorphins push through - because I haven't gotten that yet.  I am a walker.  I can walk for miles and miles.  I almost never feel the urge to run.  How is that for honesty?

But.  I may or may not have told someone that I like the svelte look of a runner's body.   (And that maybe someday I could try?)  Runner's legs are the shit.  Not runny shit.  Runner's legs.  You know, all tight and muscley.  

I saw this plan online today and realized that I could probably, maybe, perhaps handle this plan.  I do not need to run a 5K, a half-marathon, or ever become a triathlete, but two or three solid minutes in a row of jogging without DYING the DEAD?  Might be nice.