Long time lurker on this thread, first time poster here... wanted to share my progress.
Since January I've been following the Couch-to-5k program. It's supposed to be 9 weeks, but I've had lots of interruptions and lack of progress, but I've stuck with it. And I really was starting from scratch (jogging 1 minute at the start felt difficult!).
Today, I ran 5km (without stopping) for the first time in my life. On a treadmill at 8.5km/h, so it took me just over 35 minutes (I think that's about 11:22 pace for a mile, as best I can work it out).
Now I need to start running outside to make it a little more interesting! We also have regular weekly 'park run' events here where you can turn up and run a timed 5k in an organised group, so doing that is my next target.