Need help with this

I would like to know how people make plane cockpit covers like this (Image of work by Captain_Ahab_62), I’m trying to model a Fairey Firefly but dont know how to make this part.

yeah so basically they were seperate meshes before they were combined. its easier to work in that work flow. desing both path separetly, however make sure your edgeflow is correct, meaning, when you join both meshes you can easily merge or connect the edges of both.

Thanks for the help, I have found a way to extrude vertices and form the windows, then extrude inside.