stuck on loading screen

hyunjinsss  Can you load a different household in the same save?  Choose Load Game rather than Resume, choose this same save, and then pick a different family to play.  Let me know whether it works, and we'll go from there.

The suggestion to rename or move the Sims 4 folder is about the folder in Documents > Electronic Arts.  Moving or renaming it prevents the game from reading its data (saves, mods, etc.) but does not delete that data, so it's a useful test.  You don't need to do that now, but I might ask you to later.  So have a look through File Explorer on your computer to see whether you can find the folder.