I managed to set it up and everything and it works, but one thing I want to fix is the fact that in 1080p, the whole game is so zoomed out I can barely see the character sprites and such.

The Character sheet is one the far right of the screen and the action bar is on the bottom right.

The only benefit is I can see a lot more of the enviornment, but I should not be. Is there any way I can zoom in closer without having it be lower then 1080p? Because otherwise I might aswell play the DOS version.

Not looked at this for a long time. There is a confit file though, have you tried editing the options in there, scale factor for example:
http://nuvie.sourceforge.net/?page=docs

They're still the same original graphics at their original resolution (320x200).The Nuvie version just shows more of the playing field. Lowering the resolution setting AND upscaling is in this case the same as "zooming in". Why not pick a resolution between 200P and 1080P?

If you run the original DOS (DOSbox) version of ultima 6 on a 1080P screen without upscaling, everything will look just as small - but with the original 'playing field' size.

"Is there any way I can zoom in closer without having it be lower then 1080p?" ANSWER: The only way you can play these old low resolution games without scaling is on a screen with (a lot) lower PPI (while remaining at the same viewing distance ofcourse).

I don't see any documents at that link, it just redirects to the project's main page.

How do I make this game fullscreen? Setting fullscreen to yes in the config file makes the game launch with a black screen.