This isn't exactly about the T-Rex but I thought this is the most popular place for me to share. I have a tip for y'all that will allow you to level up to lvl 45 or higher (from level 1) in less than an hour, however, just know, you might need to activate cheats to make you invincible if you do not have armor yet. I personally play on Ark Ultimate Mobile Edition, so just know that if something doesn't work properly, it probably only works for that version.

First off, you'll want to spawn in West Zone 2 on the island that is split in half by a large creek. Aim for the northeast portion (which is larger than the other half), as that is the part that has all of the notes you need. There are a total of 8 notes/dossiers there, however, one is underwater on the south side of the northeast half. Just by gathering these notes (no tools/loot required), you can level up very fast due to the large amount of experience and xp multipliers they give. Refer to the Island Explorer Note map on Dododex to locate the exact location of each note/dossier.

This is what I believe to be the fastest way to earn xp early game, and by running around and gathering other notes/dossiers nearby (especially those near the West Obelisk), I have gotten to about level 75 after losing all of my progress on my previous game (level 56).

Up this so other survivors can see!

-- Comet7892