1.kill some dilos, dodos or compy so that you can collect meat.
2.Craft a slingshot, wooden club or you can beat it with fist (If your trying to knock it with fists choose a low level one; if with slingshot collect a amount of stones first also remember wooden club breaks fast so craft and keep atleast 3 more wooden club for backup)
3.Find a dilo
4.after it's unconscious open its inventory by going near to it and tap and hold. After you need to put some meat which we collected at first
5. Wait.....if your dilo eats all the meat but still not tamed put some more meat to its inventory and wait......
pack with it. You should craft a spear to help you take it down faster. Keep it away from water, and make sure your enemies don't run into water, because if the dilo does run into water, a fish could attack it, and trigger the dilo to fight back, until its all the way into the water and you can't save it. They are annoying as heck at first, but they are helpful if you tame em. Then use em to get bigger dinos, and so on. Also, try giving them names.