Welcome back.
There is an interesting little bit about the universe in Silver Surfer Annual 2. It talks of distances from Skrull space to Kree to Earth and other things. Probably one of the first things that actually creates a "map" of sorts besides Asgard. There's also some space scale things in The Nova Corps Files with the scope of the Annihilation wave.
My subordinate Galan will be in shortly with the scans.
This also exists but not sure if it was in a comic. It came from Wired and it's not really a map or a great one I guess, just showing you connections I guess.
https://wi-images.condecdn.net/image/GEp1VNDqw66/crop/1620/f/marvelmap.jpg