To connect a 21 inch screen to a 17 laptop?

I have a laptop from MSI, this laptop has a 17 inch monitor, can I connect a 21 inch monitor as a 2nd monitor? Laptop: https://www.amazon.de/...07KVZNM5P/

If your laptop has an exit, that's no problem. The size of the monitor does not matter.

Sure you can. Should work perfectly on HDMI.

I knew it, my dad completely confused me

Your laptop has an HDMI connection.

So monitor it, Windows key + P, and there's already