Should I uninstall Office 365 from my new computer? [View all]

My new computer has Windows 11 on it, and has Office software pre-installed, sort of. If I launch Word or Excel, it brings up a screen explaining that if I give them a credit card number, the software will be activated and the subscription will start.

If all I want is to install Libre Office (sp?) or my old copy of Office 2013 on this machine, do I need to uninstall the current Office Ad-ware first?

Fortunately, I have recent copies of all important files, as my previous computer is on its last legs.