You don't have to worry about partitions, in short you basically select all four disks, then create volumes and select their filesystems, if you select xfs/ext4 those will be logical volumes in a volume group and if you select btrfs those will be sub-volumes under a top volume. Then under volume to the right (where you created your fileystem volumes) you have the option to "Modify" your volume and there you can select what raid level you want to use. Also you can skip creating swap because Fedora automatically creates zram to use as swap.
fedoraproject.org