If piano is truly your career, I wouldn't risk doing ANY of these exercises just to be Primal.
I like the suggestion to walk a lot. Or just focus on lower body for now.
For finger strength, get a couple Gripmastersfrom Amazon.
For slow and easy gym workouts, I suggest an exercise ball/balance ball. For 25 bucks you can get a ball from Reebok which includes a reasonably good CD (Tanja Djevela-something). Look up "Ridgeline fitness" for some great video podcasts of balance ball exercises.
5'0" female, 44 years old. Started Primal October 31, 2011, at a skinny fat 111.5 lbs. Low weight: 99.5 lb on a fast. Gained back to 111 on sugar cheat. Currently fighting off sugar/candy cravings with bulletproof cocoa and a little rice.
I (try to) follow by-the-book primal as advocated by Mark Sisson, except for whey powder and a bit of cream. I advocate a two-month strict adjustment for newbies. But everybody is different and should tweak Primal to their own needs.