What is the contents of ~/perl5/perlbrew/perls? 5.28.0 isn't the latest version of Perl. You don't show how you tried to set this up.

" It outputs that it's installed and that I need to run source ~/perl5/perlbrew/etc/bashrc/ When I run this, I get back"

Are you sure it didn't ask you to add that line to a file?

Append the following piece of code to the end of your ~/.profile and s
+tart a new shell, perlbrew should be up and fully functional from the
+re:

    source ~/perl5/perlbrew/etc/bashrc
[download]

You'll experience problems if you don't follow the instructions.