62 years old, in good shape (play volleyball a couple times a week), but a bit stiff — working on posture and just started Rolfing, so there may be some real physical limitation on how far I can turn back.

Picked golf back up this year after being away for decades. Was a high-handicap player back then and never really worked on my swing — this year I'm getting serious about it, and my first goal is breaking 100.

I've been aware of this issue for a while — I've filmed my own swing before and been frustrated by what I see. Recently two golfers I played with, unprompted and without knowing each other, both described the same thing they saw in my swing, which lined up with what I already knew: I can't get much of a backswing going (left arm gets to about parallel and that's it), and my forward swing feels like a hurried push rather than a fluid transition. I've tried consciously extending the backswing but can't seem to get past that point.

My club speed with the driver hovers around 80 mph, sometimes a bit more, sometimes a bit less, depending on how solid the swing is.

I know TPI (Titleist Performance Institute) screenings exist for exactly this kind of thing, matching physical limitations to swing faults. Is that the right next step for someone in my position, or is there swing-side work I could be doing right now in parallel, without waiting on the mobility side to catch up? Genuinely not sure whether this is a "fix the body first" problem or a "fix the motion first" problem, or both at once — curious what people who've dealt with something similar did.

Trying to fix a short backswing and rushed transition