In the image you can see how my hood looks after adding more edges. I added symmetrical edges with the ‘Slice Loop’ on the polygons responsible for the hood thickness. I also added three edges on top of the hood. For those I used ‘Slice Loop’ with 3 as a ‘Count’ value. I moved those edges up a bit to create this subtle curve on the hood. I also added one edge on the side, to support the plane which you can see on the reference for the side of the hood. I also added two edges across the hood to give it more geometry to make the smoothing a bit better.
Add edges as shown in the image with ‘Add Loop’. You can use ‘Symmetry’ to automatically add those edges on both sides