Hello, I'm sorry to hear that you are having frequent falls. That's great to hear that you are walking so much! That's one of the best ways to exercise your body and brain! My father (aged 87) has had luck with the Kizik brand of shoes - they are easy to slip on and he doesn't seem to have issues with falling.
Here are some articles that you also might find useful regarding shoes (and you might consider walking sticks to help you with balance):
https://parkinsonsdisease.net/news/laser-shoes-gait
https://parkinsonsdisease.net/living/walking-group
Let us know if these articles are helpful or if you need more information.
All the best to you, Suzanne Troy, ParkinsonsDisease.net team member