I very much regret not learning tennis at a much younger age.
We can never stop learning... I started tennis at 46, golf at 45, quilting at 55, dancing at 42, started college at 38, got my college degree at 45. crocheted in my 20's, cross-stitched in my 30's, got my first horse in my 20's(still have my baby-she's 24)
If there is a will there is a way. A thirst for knowledge is the fountain of youth. IMHO.