Gym routine?

Is anyone in here super familiar with gym routines/schedules who can help me sort one out for myself? I'd like to go 4 days a week, upper/lower split, but I'm not sure which exercises to do to make sure I'm getting the most efficient and effective workout. I have looked at the programs on Reddit that were suggested, and some others online, but I have limited ROM in one arm, so I can't do some exercises and I'm not sure what I could swap them out with to work the same muscle groups.

Any help in helping me get sorted would be much appreciated!

Private message would be best, but comment if you feel like it might benefit others as well!