Can’t tame. They high torpor, as far as built ones show, lv1 had 5000. If one aggros on you, kill it or run as close to bed or any respawn point since outrunning them is impossible from my experiences. Will attack you if the little drones (scouts) see you collecting resources from dead animals or attack something or just have a spear or bow out. To build one, get polymer in the form of corrupt nodules which drop from corrputed animals (ones outside city walls that have black and purple taint growing on them). Everything else you can gather from robot corpses and city destructibles (lamps/tables ect).
For a basic enforcer, go around the city and gather at least 500 element dust from lampposts(preferably more), kill a few isolated enforcers until you get 20 oil, go to the wasteland killing the weaker corrupted creatures for corrupted nodules (they can be used as polymer)
When you collect all the resources, go to a city terminal and craft your own enforcer.