Training for my first 5k in 23 years

Every year I try to do a couch to 5k program and every year I fail.  This year I was introduced to Jeff Galloway's Run Walk Run program.  I am super excited about this program.  I am a former runner. The last time I ran a 5k race was 23 years and 70 pounds ago. Although I am a former runner I never really enjoyed it.  I am on week three of this program and still feeling really good (well I am sick, but not from running).  It is a major paradigm shift or me, the notion that walk breaks are okay. But I think that will lead to my success.  I want to do this 5k program 2x. The first as a beginner and the second to increase time.  Then I am hoping to go on to the 10k program.  The last time I ran a 10k was... NEVER.  I want to achieve this by the end of the year.