What am I thinking?

I can't stop thinking about it. It's consumed my thoughts for weeks. I thought I was done with running but there's a challenge I always wanted to do and the need to do it has never gone away. If I do this however, it means training in a way I've never trained before. It will be extremely tough, plus I will be training myself and there will be no coach to help this time. I've started with a half marathon training programme on Garmin to get me into the swing of things. I might look in shape as I'm only a size 8 dress size these days but I assure you I'm far from being in shape and did 6 miles today at a very slow pace because "easy" meant my heart rate was too high to run it all. I've got a long way to go!!!!