Just trim it off all the way around and chop off its head. Don't remove more than one-third of total growth at any one time, then allow the plant to regenerate before trimming again. Pruning is not an exact science with most plants, especially the shrubby ones. Dry the prunings and put them in sachets and toys etc for your cats to enjoy!

Cool your willing to use a make shift gritty mix. May want to sift some of the peat materail from the BBS bagged C&S soil as well. What remains after sifting is some darker bark pieces that looks like a finer mulch and some forest humus. Useable yield may vary, would think one bag of BBS unsifted bag O'crap should yield enough for all of them. You could also ( with some extra time on your hands) pick up a bag of orchid bark smaller size is better but any size will work from a BBS as well . After soaking them in warm water for a while the chunks will be eaiser to ( by hand) break it into smaller barkier pieces. Prior to sifting any especialy for Perlite I'd suggest to use some sort of mask for beathing protecing. Big drainage hole ? As in orchid pot drainage hole big ? The demo pic is a bit off. less humor or more fun ? Blue arrows. look sort of good as ASAP potting candidates for some practice for you but if me I'd cut them for newer cleaner root. Red lines suggest cutting them for re rooting and potted later Purple circle I'm Sort of mixed on this one. It can go either way. Bigger can survive longer but adapts more slowly.

I had the same type of jade, with a gazillion stems, but I wanted to grow a single jade tree. So divided the plant into about 8 separate jade plants. To do it, I let the soil dry enough til easy to work with, then tipped it out of the pot onto newspaper with my hand still underneath for leverage. Shook the plant a little and the stems started falling apart in clumps. That helped me decide how I wanted to divide it. I took the innermost stem and planted it in its own pot because it was straight like a tree, then some of the others I kept two or three together, depending on how I wanted them to look. Some were curved, and some were straight. Once placed in smaller pots with adequate soil, water them and see how they do! My jade didn't miss a beat. It was fun to create a bunch of smaller plants, and I shared with my friends, who very much appreciated a free plant! The innermost stem that was straight (that I potted to grow in tree form) is now developing a woody stem just like I wanted. Can't wait to see what it does this summer!

Please...indicate your general location - growing zone. Plant looks like it needs more light - branches should be able to support themselves. They are etiolating - stretching in order to reach more light. They grow skinnier and weaker. Leaves are spaced further apart. I also wonder if the container has drainage hole; what kind of 'soil' is the plant potted in and how much/how often do you water it.