What are the steps to schedule a disney world birthday celebration?

The only verified information in the supplied source concerns the character Anna from the Disney films Frozen and Frozen 2, including details about her voice actors and the film’s creators. No details regarding Disney World events, birthday celebrations, or scheduling procedures are present in this evidence. As a result, I cannot provide specific steps for booking a Disney World birthday celebration based on the given data. Typically, people might contact Disney directly, use official Disney World websites, or consult licensed Disney party planners, but such actions are not supported by the evidence supplied here. Therefore, further information from a reliable Disney World source would be needed to give accurate planning steps.