Balance is very important, don't use its strength to practice. The muscles exercised by unbalanced arms are very scary. I used to work out together. One of my buddies just sat on his back and pushed the barbell, and no one paid attention to his practice ~ ~ The last one had a big chest and a small chest. .....
Just exercise regularly ~ ~ ~ Don't believe that you practice your left hand alone ~ ~ If you practice your left hand too much, it will be uncoordinated with your right hand ~ ~ It's most important to practice synchronously.