I took clips of all the things I have done over the last few months to strengthen my left hand. Ring finger and thumb strain to be expected... Massage near elbow.

I have been playing one handed games to strengthen my right hand. My pinky and ring finger are often sore, but no strain.

I practice on the menu screen for consistency, and lv19 for timing.

I can't spin pieces and keep my thumb, on 19 yet, but I am getting there. I just throw pieces against the walls. Alternating left then right, to practice 4 taps.

I have gotten 150k on lv15 and 90k on lv18. Don't judge... I am learning this on my own.

This is just what I have worked out, not the only way. I hope it is useful. I saw one player using a rubber finger (for mail sorting), on the anchor finger. Another player was holding down one of the spin buttons and only lifting to tap...

Good bye, and good luck... may the RNG forever be in your favor!