How to make car door apparent

If I simply cut the door from the body I got a ugly result. I try to extrude edges of the door but nothing better. Since I’m new to blender, please details the steps.

Thanks

Do a Google search for “subsurf hole” it might give some idea

Thanks you

I found these :

http://membres.lycos.fr/bobois/Tuts/subsurfs/Trouer_une_surface/trouer_une_subsurf_ang.html

http://membres.lycos.fr/bobois/Tuts/subsurfs/rouler_un_bord/rouler_un_bord_rond_ang.html

and able to do this :

http://pages.videotron.com/teragone/cardoor.jpg

Still some work to do :wink: