55 here. Typing for 40+ years. No such issues. My #1 suggestion: get a good keyboard. I use IBM Model M ones -- I hoarded 5 or 6 when people were throwing them

55 here. Typing for 40+ years. No such issues. My #1 suggestion: get a good keyboard. I use IBM Model M ones -- I hoarded 5 or 6 when people were throwing them out in the 1990s. None have needed repair, bolt-modding or anything. The one I am typing on right now is plugged directly into a PS/2 port on my Core i7 laptop's docking station: no convertor needed. But if it is, convertors are something like £/€/$ 2-3. Look for one with 2 input ports -- that means it's not a passive device, which won't work: they need the keyboard (or mouse) to have onboard USB circuitry. Another giveaway is if they're coloured green or purple -- those ones mostly won't work. Good attributes: 2 inputs; an activity LED; is beige or white. Bad attributes: 1 input; no LEDs; is green or purple. I have tried a Unicomp recreated Model M and while it's a decent enough keyboard it's not as good as the real thing. Worth paying for proper, antique kit. #2 suggestion: switch your mouse to your subordinate or non-dominant hand. I did this in my early 30s and it took workload off my dominant (left) hand, and made me improve my coordination with the other one. Also, learn to clean your teeth with your less-dextrous hand. Both encourage neuroplasticity and increased mental flexibility too, I suspect. :-)