Rakudo Star 2020.01 is a useful and usable production distribution of Raku which supports the latest 6.d language version.
Windows and macOS users can directly install the most recent version of Rakudo Star from the downloads section.
Docker users can directly install with docker pull rakudo-star
People on UNIX-like systems can try out Rakudo Star from an extracted source tarball.
You will need recent versions of perl, git, make and gcc. Also a basic familiarity with UNIX.
For full instructions see rakudo.org's "Install Rakudo Star from Source" page
A quick start for Linux/Mac/BSD/Mingw etc. follows:
% wget https://rakudo.org/downloads/star/rakudo-star-2020.01.tar.gz % tar xfz rakudo-star-2020.01.tar.gz % cd rakudo-star-2020.01 % perl Configure.pl --gen-moar --make-install --prefix ~/rakudo