Have you considered trekking poles? While I don't have PN, I have multiple foot ankle knee Osteoarthritis & tendon, ligament issues. I find the trekking poles are much better for me, balance, than "just" a cane. If you have access to any water walking pool exercises, that might help too. And a good PT program is like gold for me.

Try walking on a treadmill! They are great because you can control the speed and hold on to the rails when needed. I started at a low speed holding on to both rails. I have been able to increase my speed, walking time, and am able to walk without holding on some of the time. It has improved my leg strength and balance. The YMCA, YWCA, and all gyms have treadmills. Some gyms offer reduced cost to Silver Sneakers members.