3 months ago if someone had suggested that I'd be running 3 times a week and able to run non-stop for nearly half an hour...
In addition to being able to run for that period of time, my main aims of being able to run short periods without any breathlessness and also being able to sing longer phrases without breathing have been met.
For those just starting out, I'd recommend finding someone to at least make sure you run, if not to actually run with you. My wife and I have at times both been the mean ones who have dragged the other out onto the field - couldn't have done without each other (ah!)
If you've got to the end of the Couch to 5K programme, what are you doing next? Continuing to run 3 times a week? Aiming to improve your 5K time? Joining a parkrun? Signing up for a 5K/10K race?