Tuttle solved it for you - was it too simple?
With Finder window open, as usual hold down the Option key and press Go and Library will appear between Home and Computer.
Click on Library and it will open and you can release the option key.
Right at the top - no the VERY top of the Finder window between the various View Action Arrange and maybe Share buttons on the left and the Search box on the right is the illustration of a folder with the word Library beside it.
Drag THAT folder to the favorites bar to the left of the Finder window and position it where it suits you and it will stay there
Sorted, and not a SUDO in sight