Have just tested a simple idea to make drawing easier. Basically I used the 3D software Blender to make a simple model of what I was going to draw. The model as in the screenshot below consists only of primitives and is very crude. First I thought of using an armature in the software but this was unnecessary. Just move and rotate the various body parts. Since I’m not trained at all in drawing I just put a piece of paper over screen and begin following contours. Then it was easy just to correct the drawing.
Blender 3D assisted sketch of the dino.