Toon shader for 2d sprtes with normal map

I'm using anima2D in my game and basically i want to give a toon effect to my sprites but since its for 2D i guess i have to use a normal map to get this effect. The problem is that i dont have a lot of knowledges with shader and i dont know how set the normal map into my shader, here is what i have so far :

To simplify : i have this sprite (1) used by Anima2D, so its distorded by a bone and rendered via a SkinnedMeshRenderer, and this normal map (2), the result i want to achieve is (3) using a directionnal light. Sorry if my question isnt very clear, i dont even really have a question , im just looking for some advices / tutorials / hints that can help me, assuming its possible to achieve this effect in 2d (?) i've made a lot of reshearch but i havent found any answers for this specific effect for 2d.

Thank you in advance for your answers and for you patience, cheers.