Hey, if you're a beginner, you really don't need to worry too much about your sokuto. However, if you want some advice, I'll just say that it is important in Wado Ryu to bring the knee straight forward as if you are about to do a front kick. Then you should twist sideways so that yes, you are side on to your opponent. The knee should still be chambered, and should also be facing side on to your opponent. When you push the ick out, you should twist your back foot so that the heel is facing in the direction of the opponent. This is where your power comes from. Don't forget to pull your leg back in before lowering it to the floor. I've made it sound really complicated, but as long as you start off low and slow, then build up speed and height, it will soon be a brilliantly powerful kick! Hope this helps, and good luck on your grading!