I bought my Viper (1996 RT/10) in 2001 when I was 64, I'm soon to be 68 (January). My wife was all for it and we have had nothing but fun, and fun, and fun, with the Viper. We participate with the Viper Club, go to many car shows, and I drive it on the track. This past year I did 6 track days, and hit 140+ mph at our track - much more in the car, but run out of straight.
GO FOR IT, AND BE ACTIVE WITH THE CAR. Go to a driving school, even if it is only given by your local track, or a Car Club (Porsche, BMW, Alfa,.....) that offers track instruction or drivers school.
Again, Be brave and do it.
Later,