my 3d models wont proyect properly

hi i made a simple 3d model in blender and it looks like this:


but instead, it shows up like this: (the side the camera is facing wont proyect)


any idea how to fix it?

This is the normals of your faces being inverted. Look at my answer to this question for how to fix this :

That looks like blender if I am not wrong, you can just select the whole mesh (A) and then click Ctrl+N