Terry - a great way to get in shape and to build base miles is to join our Lone Star Randonneur club, and start putting in endurance miles. And in between endurance training, build a progressive overload training plan (ie, in 4 week intervals) where you are riding at least 1, and preferably 2 days a week at threshold. Meaning, after warming up, ride 5 minutes at max heart rate, recover 5 minutes, and repeat. The following week, increase to 7 or 8 minutes. The third week, increase to 10 minutes, and decrease recovery to 3 minutes. The 4th week is a recovery week of straigh endurance training (ie, zone 2).
Then the next succession of 4 weeks of interval training, work on climbing. This is to build strength, and ultimately to increase your "strength to weight ratio". Each week is harder and longer effort.
The next succession of 4 weeks of interval training could be working on sprinting. High cadence (at least 110) for intervals of 3-5 minutes, extending this time over the next 3 weeks. This training increases your body's ability to work at a higher cardio capacity, and to recovery more quickly.
The above is an example of a 3 month basic training program that will (1) increase endurance base, (2) increase strength, and (3) increase your cardio capacity.
AND ABOVE ALL, REMEMBER TRAINING IS ABOUT HAVING FUN, DOING WHAT YOU LOVE...
FREQUENCY
DURATION
INTENSITY