First… I would find a trainer in your area who has a successful running back round. You want a basic alignment, foot, and running technique assessment and education. This may take 2 or 3 sessions. Money well spent. Then start slow! Biggest mistake is over doing it. You need to toughen up. This takes time and a plan. Baby steps. Try to learn several different styles of walking/jogging/running. Fitness walking, race walking, wogging (walking jog), speed and stride variations when you walk or run. This is fun and allows the body to toughen. Now you are ready for anything. Start to increase time and/or distance very slowly. Follow your bodies cues. It is not OK to be super sore after your workouts. Slow down and be patient. This is very doable if your attitude is appropriate. Take the turtle approach and you will be rewarded with a great new skill and a wonderful healthy habit. Happy running!