My husband fell off a ladder and broke his heel several years ago. (He was also 66 at the time) His required surgery and he was non-weight-bearing for about 8 weeks. He used a knee scooter and used a walker in the house. ( crutches we not a good idea for him) He has stiffness in his foot. Especially after ling walks. He was never offered PT. I’m strongly encourage you to seek out PT as soon as you can. It may help you maintain your mobility.