I started C25k in February after a very comfortable 50 years on the Couch. I'm now genuinely utterly astonished to find myself capable of running 5k (as long as it doesn't really involve uphill bits). I've done five Parkruns and think that they're a great invention with such a welcoming atmosphere.
Anyway, my question is:
Should I work on my speed first before bothering to work towards a longer distance?
The fastest I've run 5k so far is 33 minutes 52 seconds (the first time I did it without stopping was on the treadmill and it took 50 minutes!)