Well, I've not made it to 60 yet, and I'm not good at 'advice', but I would just make these general statements:
- be conscious of form on your lifts
- be religious about mobility and joint health
- listen to your body
Are you going to do a log here? I'd be interested in seeing that.
re: Squat -- you don't have to squat. What you have to do is listen to your body. I blew my back out 3 years ago enough that I could barely stand up and walk for weeks. I had to start all over literally from bodyweight 'curtsy' squats, to 10# db squats.
I squatted a 505 a few months ago. Let me qualify that with I am obsessive/compulsive about squat form and it hurts like hell for me to squat and deadlift. I'm probably a little retarded still doing them, point being it's not impossible, and not necessary, but doable if you want to do them.
Looking forward to see more!