Hi Dario @Caetn0 ,
That’s looking great!
You would need support loops here:

How far outward they go is up to you, it’ll need some Topology changes when doing that, but nothing too complicated. You can also Bevel the green Edges, but then do it before the Subdivision Surface Modifier. I’d opt for the holding Edges, because you’ll have more control over the Topology, which is a big advantage when using a Subdiv Modifier.