Should I buy a new Monitor?

0671689​  The graphics driver your computer has installed is from 2016, which may be part or all of the issue.  So please try updating it.  You can get the newest driver Intel offers here:

https://www.intel.com/content/www/us/en/products/sku/80817/intel-core-i54460-processor-6m-cache-up-to-3-40-ghz/downloads.html

You'll of course want the one that's compatible with Windows 10, dated February 5, 2021.  It's old too but may work better with the game.  Run the installer as an admin: right-click the download and select "Run as administrator."  Restart your computer afterwards and before trying to play.

Your computer is borderline for Sims 4 though, at least once you start adding expansions and custom content.  That doesn't mean you can't play, only that you might need to make some compromises.  The processor is fine, but you don't have a lot of RAM, and the graphics chip is on the weaker side.

So one thing that may help is to restart your computer immediately before you want to play, and not open anything else at the same time.  It might turn out that you're fine running a browser or a music player or similar, but if you're still seeing performance issues, please try this.

If it doesn't help, or doesn't help enough, turn all the graphics settings down to the minimum and test again, after another restart.  I'm not saying you need to play this way in general, only that it's a useful test in that the results will be informative either way.