There is a terrific documentary, 'Its quieter in the twilight', about the aging and dwindling team that still runs both Voyager missions
https://www.youtube.com/watch?v=F6L9Du_IFmI
Like most things, "dont knock it till you have tried it". You never have to do something you are either uncomfortable doing or are unable to do; and there always progressions for movements that might be difficult for you. For example, many overhead movements are difficult for me but the coaches will always work with you to find something you can do that will still be challenging and achieve the goal of the workout.
I remember as a 17 year old spending 50 Irish pounds on a copy of Turbo Pascal and being giddy with excitement when the brightly colored box and manuals arrived. I pretty much memorized them, and of all the things from the late 80s its the one I wish I had kept!