Whips and Chopsticks

So Im getting into some advanced whips, for example the one at the beginning of ryota ogi’'s speed combo (mrmatio), and I find it very difficult to whip the string that hard. The string simply does not move enough to fully wrap around both of my hands no matter how hard I whip. I am wondering if there is a more effective way off whipping that I dont know about, to make tricks such as these more easy.

As for chopsticks, when getting into chopsticks combos, ive always had the problem of the strings sliding back on your hand, which makes it very difficulit to bring the yoyo in and out of my thumb and pointer.

If anyone has any tips on these that would be great!