Strawberry Perl works well. You are / your newcomer is likely to need some use of the command prompt to see STDOUT & STDERR & use the cpan[m] tool, but file associations can be set up automagically by the installation process (I'll accept corrections on this), meaning that double clicking on a .pl in the explorer will Just Work. Also, the path to Perl itself is automatically created as part of the install process, so it can be run from any directory. But the real question is the purpose. Are you going to be writing Perl for $newcomer to execute, or will $newcomer be writing Perl? My experience of WinPerl IDEs has left me unimpressed. Padre was written by our own szabgab and I know one person who swears by ActiveState's Komodo, but I prefer Notepad++ with a command prompt to execute the files as & when I wish. But then I LIKE text interfaces.
If you want a cheap Linux box & are prepared to settle for 4Gb of RAM, consider a Raspberry Pi. You will have to add the hard disc over USB, but it may well be way under your budget & is likely to be more fun. Again, purpose matters here.
Regards,
John Davies
Update: I see your interest in WSL suggestions. If you want a comparable variant & aren't scared of an old version, git comes with Perl 5.8.8 on Windows.
C:\Git\bin>.\perl.exe -v
This is perl, v5.8.8 built for msys