If you look carefully at the first picture, I think the whole craft is pretty self explanatory. I suppose you could substitute green and red M&Ms for a Christmas version.
The candy corn does a darned good job of keeping the sticks in place, so make sure you have them arranged exactly how you want them, and hold them that way with one hand, then put the candy in the vase/jar/whatever with your free hand. THEN hot glue more candy on your branches however you’d like. I went with a kind of minimalist approach with this one, but I really like it. The picture doesn’t quite do it justice.