62 was a good age. I'm 72 and rode 117 miles yesterday. I started riding again at 50 after a break of 30 years. My training method was pretty simple: See hill, ride up it. Ride away from home until I was really tired, then ride back. Take food and water. Eat Clif bars, 1/4 bar every 1/2 hour for now. Wear good quality shoes and use clipless pedals. Concentrate on a smooth pedal stroke, every pedal stroke. Try to do 3 perfect pedal strokes in a row.