Tamed this dino when I was level 10.
Use slingshot and about 20 rocks should be enough.
Before you can get saddle he can be your protection or in critical cases decoy.
Also when you need stone these lads are savages.
Doedicurus
The Doedicurus is an armored, armadillo-like herbivore prized for gathering and carrying stone. When threatened, it curls into a remarkably well-protected ball.
Player-written tips for taming, using, and fighting the Doedicurus in ARK: Survival Ascended & Evolved.
I tryed to farm obsidian but it wont farmit just stones