Unless you want to actually develop Rakudo itself, the recommendation is to install the Rakudo Star package. It contains the Rakudo compiler, documentation, and some extra modules. It can automatically build MoarVM, so you don't need to worry about that.
Windows users are even more spoiled, as the Rakudo development team provides ready-made binaries of Rakudo Star in msi format.
In this screencast I provide a basic introduction to arrays in Perl 6.
The Perl 6 developers hang out on the #perl6 channel on frenode.net. This screencast will show how to connect to the channel using a browser and how to get help on the channel.
Given an array like this:
my @levels = <TRACE DEBUG INFO WARNING ERROR FATAL>;
and give one of the names, e.g. 'DEBUG', how can we know which element is it?
This screencast was first published in July 2010, but the examples are mostly still correct.