Stuck on preparing download

@kelsieo2020  Are you trying to install the game or update it?  If you want to install, please see this thread:

https://answers.ea.com/t5/Technical-Issues-PC/can-t-install-sims-4/m-p/12388267#M245475

If you want to update, try repairing instead.  Clear the EA App's cache:

https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/

Restart your computer, open the EA App game library, hover over the Sims 4 icon, click the three dots, and select Repair.  Then see whether the game is updated, and if not, try to update again.