there are other important groups that normal players can apply for, but remember it's not a easy task and you must have much experience and competence:
https://forum.toribash.com/showgroups.php
This link shows all the staff groups available. You can PM one member of the group you want to apply for more information. My suggestion is that before you try to apply for any moderation role, learn more about the forums, help new players here and in-game, post more (but never useless posts or spams), etc.