@sammierose18 If you really want to do upper lower, you'd be better off with Lower, Rest, Upper, Rest, Lower, Upper, Rest.
You want to do leg-oriented things before upper because back effects leg exercises more than recovering from leg effects back.
You also may want to make the first Lower a quad-priority day (heavy exercises are quads, light on hams,) then the second one posterior chain focused (heavy pn glutes/hams, light on quads.)
Theb your first upper would be heavy on pull muscles (back, biceps) and light on push (chest, triceps), then vice-versa on the second push day.
Depending on your training age, you'd benefit from putting extra arm and shoulder exercises on the first Lower day. Don't make it a strict dogma. The reason for this is because 1) arms (and side delts) aren't very systematically fatiguing like legs are and 2) it allows you to load them heavier and train them with more intensity than if you'd do them on the upper day.
Something like this:
Lower 1:
Lateral Raises (3x10-20
Barbell Bicep Curls (3x5-10)
Skull Crushers (2x5-10)
Squats (4x5-10)
Leg Curls or Light Good Mornings (2x10-15)
Rest
Upper 1:
Pull-ups (3x5-10)
Row of some kind (2x5-10)
Dumbbell Incline Press (2x10-20)
Chest Fly (2x10-20)
Dumbell Curls (3x10-20)
Overhead Tricep Extension (3x10-20)
Dumbbell Upright Rows (3x10-20)
Rest
Lower 2:
Cable Cross Body Lat Raises (3x10-20)
Deadlift (2x5-10)
RDL (2x5-10)
Hack Squats (2x10-20)
Leg Press (2x10-20)
Upper 2:
Barbell Bench Press (2x5-10)
Incline Barbell Bench Press (2x5-10)
Some kind of row (2x10-20)
Lat Pulldown (3x10-20)
Tricep Pushdown (2x10-20)
Incline Curls (3x10-20)
Facepulls (3x10-20)
With upper lower, you have to sacrifice something to not go into junk volume. In this case, rear delts get worked once directly (as rows work then enough to grow slowly,) front delts get all their growth from chest exercises, no forearms or calves and arms take a back seat if you don't add them to one of the lowers. Which, that's fine for a beginner.
The other issue is that you have to increase the set count slowly over the meso or you'll burn yourself out like icarus.
Just doing a whole-body split in the style of PPL would help, as long as you can keep the drive to go in 6 days a week.