A very quick way to tame one is to do a mission with a vault included, but use like a high damaged dealer

To tame you have to complete missions that have a vault involved

You can get tamed thralls via the missions in the city

So i had a single player valguero world and i decided to ( don't judge me there was no other option) spawn some in and after that i couldnt walk backwards and there were these “invisible walls” so i couldnt get into my own base, very VERY frustrating