My Dilemma

I have been trying to figure out if I should work on speed or endurance first.  I think I have decided to work on endurance.  I can now do a very slow jog for about a mile before wanting to walk.  My very slow jog = 13 minute miles.  OR, I can jog faster (11 min/miles)and tire out after 1/2-3/4 mile.  So I have decided to increase my distance of my slow jogs, and once I can jog a full 5k, then I will work on speeding it up.  Maybe by doing it that way I really will meet my goal of running a 5k before the end of the summer.  Even if by "running" I mean slow jogging a 5k.  :-)