There are many techniques for successful cloning. The hardest part is finding what works for you, and most people get to their own method through trial and error.
I put mine in cups of water in a tiny tent under a blurple with a crate over the plants (to cut down on light without sending the cuttings into flower). I use little cutout cardboard flats to hold the cuttings so they don't curl in the cups. The temp swings between 65dF and 75dF, based on the lighting schedule, and I keep the humidity around 90% RH.
Two weeks later, I put them in soil.
This method works for me. Perhaps you can take some part of it, perhaps not. Cloning takes practice.
Again, it's common for completely different techniques to work well. I hope you find yours. Cloning is awesome.