Pendulous - when the canes don't grow upright, but rather will begin to hang down. It's fine to let them hang (they do in nature, after all), if you can manage the plant that way, and get it enough light if it grows on a windowsill.
I kind of hate to advise on staking lol - would hate if you end up breaking the new growth due to my advice! You can stake now, or wait til it's bigger.
How I stake new Den canes - place a stake next to the new growth, and use a loose loop of twine, yarn, or twist tie. Don't force the new growth at all, just put the loose loop over it (make like a figure 8 from twine, yarn, or twist tie)
Here's sort of a lame example (see photo)of what I mean (I don't have any dens with new growth right now)
just to give you an idea of what I do. You can then slide the loop up as the growth grows.
Just be gentle and careful, and don't force it! You can wait til the growth is bigger, as well, and less likely to break off - you can turn the plant frequently to keep the new growth growing somewhat straight in the meantime.
If you got this plant at a store, I would suspect it is a nobile type and would want cool dry winter next year.
Hope this helps