Welcome from one newbie to another! We have similar stories. I'm 53 and just started riding a bike for the first time in years. I was an aerobics instructor for 10 years. Lost cartilage in both knees, and ended up "retiring" from aerobic dance at age 37 because my body was too beaten up to take it any more. I was heartbroken because it was the only activity I'd found that I truly enjoyed.

Congrats on making your first ride! 2 miles is awesome. Keep at it!!