NACA Airfoil Meshing Problem
 

Hi guys,

I have to compare the analysis of the NACA 0012 wing from different angle of attack. But I can't create the mesh image below. What kind of geometry should I create? I do not understand which step I am making mistake. What dimensions do I need to enter and how should the geometry be formed? I need help. I'm a mechanical engineering student. I'm not a professional. I have to do this for my undergraduate thesis.

https://i.ibb.co/VYDx7YL/1111.jpg
https://i.ibb.co/xJp036Q/2222.jpg
https://i.ibb.co/48rk2cG/Naca0012-mesh-final.jpg