I agree with the points made already in this thread about shoes.
Your post doesn't mention it, but you should build up a solid base (2-3 months) of walking first before transitioning to running.
Slow down your running pace - less speed = less impact. And at this stage it is more important to get used to the motion of running rather than worrying about the speed.
As a regular hiker, strong ankles are important to me, and I am a big believer in barefoot calf raises as one of the best ways to strengthen the muscles in the feet and ankles.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.
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