Here’s what I did in leveling up quickly.
1. Spawn in south zone 2.
2. Run to the east and you’ll find a swamp.
3. Lure sarcos and boas out of the swamp (make sure you don’t lure any kappas and don’t get bitten by the boas ok?)
4. Find a giant group of wild turtles and trikes.
5. Let them battle it out and kill one of the swamp creatures when it is low on health.
As a beginner I tamed several of these. I am now level 80 and I still have most of them. I use them mainly for base defense and storage. If you have a feeding trough nearby you basically have a living chest.these have great health and female's will give eggs for food.