I've been trying to create an a320 fuselage, but can't seem to get it right.

I've sketched a side view of the fuselage, and a front view of th section (a circle). Now I'd like to kind of extrude or loft the circle "inside" the side view sketch, so it becomes a solid fuselage. But I'm really bad at it, and have no idea of how to do it. Can anyone help me out on this one?