As with a mouse, positioning is important. Right on the end of a chair arm is good. When you type, do not use a wrist rest . On this I stand firm. Type like you are playing the piano, forearms raised, wrists slightly flexed.
Dramatic flourishes are healthy.
Only do not strike chords. I enjoy horror stories, but really, a few details would be nice. As much as I would like everything to be the industry's fault, there are shortcomings on both sides. Inexperienced computer users blame their machines when it is their own lack of knowledge at fault. Still, finding support and assistance, and just getting a straight answer, can be a real chore.