Im normally the guy that writes up the technical docs. I dont know how to make a masternode on the testnet, havent even tried tbh, devs made this script for people https://github.com/Kore-Core/KORE/blob/v13/tools/masternode/masternode_creation.sh
you can take a look at that and see what you think but seeing as the network has been stuck for so long you wont be able to make a mn.