Having second thoughts

I've been worried about the time and the miles walking. With my knee feeling so good I'm thinking about running more and more. My friend sent out a schedule for those of us who can't run for more than 3 minutes without falling over. It looks very do-able. I set out today to start the schedule. Walked 2 minutes, ran one for 30 minutes. I felt like I hadn't worked out at all. I think I can really do this.