You're technically a member of the group in that you've been accepted into the group and have a registration number. On your acceptance, you would have received a welcome message with a list of things you needed to complete in order to actually participate in the group. Refer back to that welcome message to learn what you need to do.
One of us should've given your registration number on your join request. Also, the Academy Arc doesn't start until March 23rd, so for now just create your OC, rp with people, and don't forget to comment your beginning stats on the Official Stats Blog ^^
I could have sworn your original journal said we get the number when our questionnaire is approved, so I sent it in number-less. It got the Jiraiya stamp of approval, but then I noticed my actual membership to the group expired before it could be approved, so I re sent one this morning. Am I still going to be able to enroll in the Academy by Monday?