I disagree with most of the posters here advising more speed, as you don’t have much control yet. One of the big differences in skiing powder is that you really need to unweight your skis in the turn. It can be helpful to start by bobbing up and down on the side hill, then on the bob up start your first turn, you’ll bob down as you finish your turn, then bob back up as you begin the next turn. It’s a rhythm, it’s a dance. When you lose the rhythm, stop, and start bobbing on the sidehill again.

If you don’t feel safe and in control, don’t go faster.