They will certainly demonstrate everything right from how to hold the pencil/ brush, to how to make the strokes to every minute detail that goes into completing the picture. And as it is, art is taught through demonstration. You can watch how the strokes are being made on the screen and follow the same on the paper. And since these are live and individual classes, you can clarify your doubts with the teacher during or even after the classes. The teachers are well accustomed to the pros and cons of teaching art online. They design their lesson plans accordingly.