What I did is I went up to it and used my bola. It worked like a charm and hit it with my club. I once tried with a sling shot but it died so don’t do that. Takes berries pretty easy but be wary of titanaboas pretty deadly has a sarcoand pteradon protecting the tame.
FOR EARLY GAME
You will need:
Not to go into water
1. Go into a swamp
2. Wait until it’s alone, out of water, and not looking at you
3. Bola it from behind
4. Go ham with slingshot/arrows FROM BEHIND
5. Put a stack of 20 meat in its inventory as well as 5 narcotics
6. Keep an eye out
7. Make sure the purple meter stays in between the “S” and “C” in unconscious. If he goes below, force feed narcotics with RT, R2, or left clicking
9. Get a saddle and enjoy!!
In early game, you can try being on top of a rock or a stone building (lvl 20) so you don't get licked. You can either shoot rocks or tranq arrows (lvl 20). After some time, it'll try to run away. When it does, use a bola and knock it out.
Get a ways back as they can knock you out. Begin firing your tranqs and wait for it to become unconscious. Easy tame, just make sure to bring plenty of resources to tame this creature. You can bola it if your too close to it, so it can’t pursue you. Must have this as it can make a ton of cementing paste in a certain period of time. Good to have with you as you patrol the island for more dinosaurs.
Preferably drop in a taming pen with an argentavis or bigger birds, if you can’t do thst then just bola it and shoot tranqs at it until I falls asleep. Fast with its jumps and decent swimmer. Great for early cementing paste