I'm here for you - but only if I can join you!
I did C25K 3 years ago at 16 stone, just slowly slowly, I never did more than two runs a week (the recommended is 3) and never had any adverse effects from taking it slower. Alongside some really small diet measures (genuinely, nothing crazy, just mainly... stop eating pudding with every meal) I lost 4 stone!
I confess after changing job and schedule, and me blaming such a hot summer, I've given it up and want to get going again before the weather gets awful. I've put on a stone, fine, I'm not beating myself up, but I'd like to stop it in its tracks. Do you want to join me in starting again?
I remember things that helped: pick a playlist of old tunes I loved from years ago. use a (free) C25K app, I often repeated the weeks to get extra confidence, if I gave up for a couple of weeks I went back a week and it was amazing how easy it was... Also if you're super unconfident, I loved running (I called it waddling) in the dark when nobody could really see you.
Want to start tomorrow? I will go out if you will!