Hi! I am Adventuretimegurl123, another bureaucrat of the Adventure Time Wikia.
To answer your question: It is not easy, being promoted to bureaucrat takes a long time. You already made a boo-boo by asking to become one. Don't do that. But here is the lowdown from the Admins page of the Adventure Time Wikia:
For becoming a bureaucrat, it takes much experience and devotion as well as an admin position. If one wishes to become a bureaucrat, please consult an admin.
Users wishing to become a bureaucrat should meet all of the following requirements:
Must be actively contributing to the Main Space.
Have a history of contributing to the decisions of user rights.
Must be nominated on the Nominations for Rights page by another admin with support from at least 2 bureaucrats.
Users wishing to become a bureaucrat should show these characteristics in a addition to the administrator characteristics:
Be able to collaborate with the community in decision-making.
Have been an admin on the wiki long enough to know and have experience with the procedures of being an administrator.
Do take into account that an admin or bureaucrat who is inactive for at least a year without notice is expected to step down. Bureaucrats that have been inactive for at least two years can be demoted by Wikia.
Note: You need to have 500 or more mainspace edits, be active in the community (chat, etc.)
Hope this helped!~ Adventuretimegurl123