You'll need to make some space for the Lniux partition. Use a partitioning tool like Paragon partition manager, and resize your NTFS partition to make it smaller. You need to leave about 5GB to have a comfortable desktop install. Less will do, but you'll have less space for files.
Once inside distro installer, you need to make 2 partitions, one root partition /, and one swap partition.
Once inside distro installer, you need to make 2 partitions, one root partition /, and one swap partition.