I'm another one who recommends Couch 2 5K.
22 months ago, realising that my 3yo could run away from me, and I couldn't catch him, I vowed that I had to get fitter.
I went out early on a Saturday morning, in walking sandals (as I didn't own a pair of trainers), and put the first podcast on the speaker on my phone (as I didn't own a pair of headphone).
The first one nearly killed me. 9 individual 1 min runs. At the end of each 1 min run, I was heaving. But, there was serious sense of achievement, it was the first time I'd run on purpose in 20 years, in school sport.
The next day, I got a cheap pair of trainers and headphones from the supermarket. And I carried on. I'm a stubborn thing.
I've lost 4 stone now, can run for 2 hours without stopping (18km) and will be taking part in my first half marathon in May, to mark 2 years since I started.
I'm tired, and I ache, but for a good reason. I can go out running with the DC on bikes and scooters. I can play chase and tag, and the children can hold their hands around my waist when they hug me.
I never. EVER. Thought that I could be a runner.