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If you want something practical and productive right out of the box then just go with Ubuntu for any hardware.

Thinkpads are popular in the Arch community (and vice versa), so there's discussion and documentation available if that's your cup of tea.

Do you have link for the Arch community where I can read more about what you are referring to., I am not familiar with that... Thank you !

The Arch wiki has general information and laptop-specific errata for most models:

It appears the X1C 6th generation doesn't have a page yet, but it's likely extremely similar to the 5th generation one.

Start with the Arch wiki, and go through an installation in a VM. Get your feet wet with what Arch is.