This covers obtaining the ISO, connecting to Wi-Fi, partitioning, formatting, mounting, installing, setting up encryption and installing GRUB, in one article. Also includes some tips, like quickly mounting from install medium. Maybe this helps someone.
BTRFS still doesn’t have working RAID 5 or 6, which basically means its not a viable option for home NAS use unless you’re okay with the limitations of RAID-10. Personally I use BTRFS for my system drive and ZFS for my storage pool.