Cinnamon is one of the resources in New World that you may want to start collecting. You can find Cinnamon from herb plants located in Endengrove, First Light, and Cutlass Keys. 運が良ければ, you can find around 0-2 cinnamon every time you pull an herb plan from the mentioned areas.
You can find the complete guide on how to obtain cinnamon in New World by following the link below.