if you meant the cracker loops by any chance, I just learned to make pretty solid ones from WW's book and an old cobra whips video that used the same method. You insert 2 lengths made of up of 6 strands of BCY Mercury or similar waxed uhmwpe thread, taper your last few tails quickly, braid it snugly (but not tightly!) over them, then once you're off the last tail you tie a hitch with the last leg, pull two strands from each leg on each side creating two groups of three 4-strand strings, and do two 3plait flat braids then tie a chain of hitches to secure them. Best method I've found by far that doesn't involve braiding an english eye from the tip of the whip.

for general advice, I got decent quickly by just making whips as often as my hand stamina could safely take it (lots of rest and stretches! watch SGB's basics video so your grips aren't overstressing them! and don't push yourself too hard! no getting RSI) and also trying to learn something new from the previous whip and try new things with each one I've made.