To tame one of those early game you just need to get yourself a slingshot (You can get the engram at Level 5), a low Level Trike (Level 1 - 30) and to be safe around 40 Stones. Then find some Trees and attack the Trike with your Slingshot then use a Hit and Run Technique. It should be much easier because the Trike gets stuck in the Trees and has to get around them. Which gives you enough time to shot him some times with your Slingshot. Once he is unconcious you just have to gather Berries. Use Mejoberries for a higher level after taming. Keep an eye on the Trike's Torpor(You find it in the bottom right hand corner in its Inventory). Once it drops on 0 your Trike will wake up and you have to knock it out again. To raise its Torpor you need to put Narcoberries in its Inventory, click on them and then click on the Remote use item Button (Each Narcoberry adds 8 Torpor). In the Dododex App you can Look how many Slingshot-Shots, Narcoberries and Mejoberries your Trike needs. Good Luck!
I have found that the Triceratops/Trike prefers the tintoberries, my strategy for taming lvl 10< Trikes on a new charachter i usually grab around 40-100 tintoberries and 3 or 5 narcotics/10-25 narcoberries and i use the starve method for around 4 minutes before using a narcotic and putting the berries in!
The trikes are amazing for gathering a huge amount of narcoberries, i ride my Trike to the hills and keep hitting the bushes and then I access the Trikes inventory and grab what i want to keep and then press drop all items for the Trike.
I had a level 45 trike it got stuck in a tree and I was able to hit it a few times with a slingshot and it was mine! But when I cut down the tree it got killed! Be careful when cutting down trees for tamed dinos!!
perfect for early tame and can boost your ark game exponentially. after unlocking slingshot, find a low level (5-10) and shoot it from a far distance, then just walk backwards and continue shooting (you can turn and sprint but this takes much more time, or, if you're lucky you can find a big rock that it isn't able to get up on and shoot it from the top of that) it doesn't take too many rocks and only about 15 minutes of making narcotics. after getting one trike, use it to collect berries (if you're a high enough level) and you can make narcotics extremely fast making taming easier.