How do I hollow a 3D model in Blender? I am new to Blender and barely know it's features. I am working on a game and I have to make flying airplanes for it.  I want to hollow the fuselage of the plane so that I can make the interior of the plane. I am using YouTube tutorials for the time being, but I haven't found one where the fuselage gets hollowed. I will also need to make plane windows, I think it has to do with the main title of the post. Can you guys help me? Thank you in advance!
I also think you need to use solidify modifier. It add thickness to you polygones. Simply, make windows holes into your fuselage and then use solidify modifier. And you will have hollow fuselage with windows.