@armyranger57
Walking and weight lifting are certainly good forms of exercise. However, exercise for PD is most effective when it engages both body and mind. Have you seen a physical therapist for specialized PD physical therapy? Here is information from the LSVT website about this program.
https://blog.lsvtglobal.com/the-science-and-practice-of-lsvt-big-and-lsvt-loud/
Most major hospital systems offer this kind of physical therapy. If you have not received a referral for this type of PT, I would encourage you to request one.

What Parkinson's symptoms are most troublesome for you right now?