Here's what you need to know: how to tame a compy:

Step 1: craft a sleeping bag and take a nap

Step 2: get some prime meat (compy only eats prime meat.)

Step 3: get a bow with truaq arrows (or you can just do it with a bat.)

Step 4: find a compy

Step 5: shoot truaq arrows or hit it with a bat until it's unconscious

Step 5: put narcotics in it's inventory and make it eat it

Step 6: shove prime meat in it's mouth

Step 7: wait (compys tame faster.)

Step 8: when tamed put meat in it's inventory (they die fast. At a couple minutes.)

And BOOM you got a compy