Firstly you can only share iTunes libraries from a computer, so you won't see your iPad as a shared library, also you don't have an option to import to an iPad, only to another computer.
Shared libraries are not supposed to show up in the finder ***. The show up in iTunes.
or in the music app on your iPad.
*** The finder should show other computers on your network that have file sharing enabled, this is not the same as home sharing, but if you don't see the other computer you may want to check System Preferences > Sharing and make sure that File Sharing is checked on both computers.