I am working on my own project with applying science to Star Wars. I try to meld the fantasy with as much real science as possible, but I am having a problem with the size of the universe. I am writing this from a perspective of a scientist living in the Star Wars galaxy. I have to assume that scientist in a GFFA know (at least a little better than us) if the universe is infinite or finite in size. In the real world, scientists conclude that the universe is flat with a 0.4% margin of error. I am therefore going with a flat universe, and I read that the universe being flat does not automatically make the universe infinite. FTL travel is incredibly commonplace and easy in Star Wars, but someone on TOR.com determined that it would take 11 years to reach another galaxy 100 million light years away SO FTL does still take time and it doesn't mean they would've explored all the universe by now. In canon, intergalactic travel is very dangerous, so it makes sense why they haven't left the galaxy.
Based on all this; I ask. Should I go with an infinite or finite size of the universe in my project? I am leaning towards finite because an infinite universe messes with my head and the existence of the Force doesn't make infinity a popular option but give me your totally honest opinion.