I’ve been thinking for a while now that I want to start speedrunning this game and I will be posting some runs within the following weeks but I have one main question. How do I go about submitting new categories because I have some ideas I think would be amazing categories that me and the fans of DI2 would enjoy running but I am not aware of how to submit.

Feel free to submit ideas, however it is typically better to be an active member of the board with other runs in the current categories before you give ideas for categories, as well as running these suggested categories yourself before they are added to any board. I appreciate the enthusiasm though!