It's ready to pot up. Congrats! Some are easier to water root than others. I usually do the "safe" soil route first,then if all else fails, water it is!

I water root 99 percent of all my cuttings as I have only ever lost maybe 12 cuttings in total from water rooting, and the cuttings that did not root had issues like being shriveled when they arrived, or some sort of rot was already on the bottom when I received the cutting.

The minute use see nubs or full on roots you can plant them up. I like to pot them in soil before there are too many roots as the roots grown in water are thinner and more fragile. So you are always better off potting them up as soon as you see some kind of root growth.