Nailed it! (Took 13/14weeks)
If I can do it you can you too (or probably already have)!
Edit: took the video down as it doesn't work. So I'll write down my thoughts in text instead:
This run almost had it all, there was a downpour and a rainbow, there were dogs, people and kids to navigate hence my heart rate jumped up a few times.
Managed to run 3.2km without any problems, both my longest run by distance and one of my faster paces.
In my excitement I missed whatever Michael had said at the end, whoops! Tbh I hadn't really been using the app, once I started running nonstop and had a watch to track my time and heart rate.
What now? I think I'll consolidate and work on my heart rate alongside it. Hopefully I can keep strengthening my knees as well. Inevitably I'll probably get bored after the first run....
Thank you everyone on here, sharing advice and even insecurities really helped keep me positive!