I recently started taking a painting class at school where we are using oil paint. From what I've seen in digital painting, the general technique involves getting the general colors and shapes of the picture and then building up the forms with lights/darks. I've been trying something along those line in class, and it seems to result in problems such as too much paint on the canvas, excessive smudging, ect. It seems like it might be more than not having enough experience in the medium.
My question, should there be a real difference in the the techniques used in digital and (oil)painting or is building layers in oil a reasonable option? If not, what are some other techniques used in oil?