Walking is AMAZING as a first exercise. It's all I did for the first two months. Let me tell you, it makes such a difference to fitness, especially once you are able to do it for an hour or more at a time, and quickly, too. You'll be surprised.
If your goal is to run, then I highly recommend trying to get in some of your walking (as much as possible really) on rough or uneven surfaces, like grassy fields, unpaved park trails, and so on. It helps a lot in strengthening muscles and tendons and so on like the ones in your ankles that are currently giving you pain. There's a certain basic level of leg strength that you need for running anything more than a few steps, and it takes time and work to build it up.
Take your time, be patient, do what you can, and you will get there.
Height 5'8 1/2"
GW: Originally 150. Maintaining at about 146 since June 2013.
5K 4/21/11: 31:55
|46 Maintenance Weeks