Try 'cadence drills'...start by pedaling at a higher cadence for brief periods of time...maybe one minute every five or ten minutes. Increase the higher cadence times every couple of weeks to allow your body to adjust.
I'm 68 and my average cadence is 90+, a bit less on climbs. I ride around 200 miles per week, 6 days riding/1 day relaxation. It is an easy cadence for me though I've been riding at this cadence for decades.
But really, do what makes you comfortable and feels good. If you aren't enjoying the ride you are doing something wrong...