OP said:
[[ I don't think theres a way to use finder with an external drive... ]]
Huh?
The finder should work with ANY Mac-formatted drive...
You should know that your "Library" folder in your home folder is normally -invisible-.
You need to make it visible in order to access it via the finder.
Open the Terminal app (in the Utilities folder).
Copy and paste this command into Terminal, then hit return:
chflags nohidden ~/Library
This will make the user library visible and you can navigate within it.