You’ve accomplished quite a bit over time. As you said though, martial practice impacts the body more heavily at this age. Luckily, my teachers seem open to allowing for ‘modifcations of the classic forms’ depending on physical ability. I was encouraged to try with this group now due to my memories of them working with clients who have Cerebral Palsy. So I knew this Dojo should be open to compromise here and there.
One key step; don’t quit
And good luck