Korean or Chinese Grip

hi! im an offensive player who uses a korean penhold grip, but i have nobody who teachs me the backhand as a offensive weapon, i only use it to control the balls or to block, so thats my actual deficiency, and thats what is making me lose my games... i think only watching videos to learn it will take too long, so if i start to use a chinese grip it will be the same.. but i do have somebody who teach me how to use long pips, should i try to use the pips in my backhand? the one i dont use like a korean penhold... should i change to a chinese grip? or keep my self like a korean grip??

Thank you..