Hi, I'm Diane and I'm happy to help you today.
You can uninstall it in Windows Settings > Apps > Installed apps - search for Outlook (new). But it will be reinstalled and pushed on you if you use windows mail.
If you use classic Outlook desktop software that is installed with Office desktop software you can set registry keys so you don't accidentally switch it on. Instructions are here: https://www.slipstick.com/outlook/classic-outlook-not-new-outlook/
Let me know how it goes, I'm here to help you further if needed.
-- Diane
Disclaimer: slipstick.com is a site I run as a Microsoft MVP and the content is much more accurate and relevant than a general internet search. While the site is in English, there are translations options under the search box.