Feel free to laugh, if I were you, I probably would. Ok… I don’t know how to make more than one frame. It is pathetic, isn’t it? I just want to know how to add frames, cause all I can do right now is just one frame.
Normally clicking on a frame of the drawing element in the Timeline or Exposure Sheet should allow you to draw in that frame (in the Drawing/Camera view). Moving the red timeline marker will extend the length of the scene.