Heather...
You can't apply to "the service acadamies", you must apply to each one separately/ None of the paperwork carries over except your CFA scores, and not necessarily those (USAFA).
What grade are you? Are you wanting to apply to the class of 2018? What are your goals? Which academy do you want to attend the most? If you really want to attend an academy you should have some pretty strong reasons why. It is extremely challenging and each academy is a path to a different career.
Do that research and you will see that each academy has a strict order of steps that must be accomplished. As for your question, you don't "do DODMERB", you will be instructed as to how to proceed, when and if an academy decides you are a valid candidate with a certain portion of your application complete.