As a starter, you may think you won’t need a stone gatherer, such as the Doedicurus, since the Ankylo also mines stone, but, trust me, this fella will make your life a million times easier! Also, they are surprisingly good swimmers!
The Doedic is one of the most essential Dino's on ark. It's the most important thing when building stone buildings, or other stone structures. The higher the level the better, and weight is essential!
I’ve seen a lot of tips on harvesting obsidian and metal of people complaining how they get only stone from harvesting it and that’s because the doedic only harvests stone