+rep

?

Maybe I'm playing like a beginner

have an offer for ya, added mate.

Sit straight and remember to keep your back straight.
Keep your elbows bent at the right angle.
Face the screen with your head slightly tilted forward.
Keep at least 45 - 70 cm of distance between your eyes and the screen.
Еxpose the shoulder, arm, and wrist muscles to the least possible strain.

???