Please see the drawing tutorial in the video below
You can refer to the simple step-by-step drawing guide below
At first we drew circles as a guide for the head.
Sketch the body. Use curved cylindrical hand-painted.
Sketch out the pelvis and legs. Use oval foot print.
Start detailing. Draw a cup of helmet. Draw the tube on the chest and knees guard.
At this step, delete the rule. Make the roads smooth and clean.
Finally add color to make him a better astronaut. Thank you!