Not saying that I'm an expert grower, but I have cloning dialed in to nearly 100% success. Prepare a bucket or bowl of water (maybe 3" deep), your scalpel, cloning powder or solution, and your cloning tray / medium (I use Rapid Rooter plugs) / the tray cover, and a heating mat. Add an inch or so of water to the tray. VERY important: check the temp after a few hours to make sure the heat mat doesn't burn your plants. When you've got all your stuff together, Cut a few (at the time) branches. They don't need to be over 8-10". Cut or pinch off any small growth except for the top few leaves. Trim off about half of each leaf; cut the end of the stem on a 45 degree angle and drop it in the water. Take one out at the time and dip it in the cloning stuff and place it in the medium and put it in the cloning tray. Rinse and repeat til you get as many as you want, and maybe a few more so you can pick the hardiest ones. Put the lid on the tray and a low powered light above it; it doesn't need much, maybe one of those "blurple" cheapie LED lights that everyone bought years ago and paid way too much for.
This past spring I bought 3 Colombian Gold landrace seeds. I germed them for 3 days and When I unfolded the paper towel (sealed in a baggie and laid on top of the warm fridge), one of them had a 4" tap root!! See pic attached. I took 6 clones and harvested 9 photo plants in October. I also took about 50 clones just before they flipped into flower. I thinned out the shorter ones, leaving about 30 plants. I just chopped 10 of them last night and leaving the rest for a few more weeks. I have two Kratky boxes like the one in the last photo.