Help in repetopology

Hi guys!
I am a beginner in blender. I was making this character model and when I started to retopology, I got confused. I have turned on snapping and also shrinkwarp modifiers. But the plane gets messy and I cannot understand what to do.
Can you please tell me what should I take for the retopology of the model.
Thanks in advance

In the screenshot, snapping is off. The magnet icon beside the snapping type toggles snapping on/off. Good luck :slightly_smiling_face: