I have a single head dracaena that I would like to promote additional branches before it gets too tall and spindly. How do I do that?

I cut off the top of my plant because the folliage and the top of the spiral was turning yellow and wrinkly.
It looked like there was a wax seal on the top of the plant that I hadn't noticed before.
I now have a cut plant and am wondering if there is something else I should do with it or just leave it alone.

After cut, it's better to grow the plant in the soil in garden or in a pot.

I had one of my stalks turn yellow also , little did i know that i wasn't supposed to water it with tap water ( and did ) So let that dry out and the remaining one is fine , and i am giving it tap water , but how much of the water should i give it for just one stalk?