The first thing to do - to submit a preliminary application (available here) on the website of DonSUM. After that you will contact a representative of Fan-club and assign the pre-interview or will held it over the phone. In the case of mutual interest, you will be asked to complete an introductory questionnaire, after which you will receive a FanID membership card, of the Fan-club, and you will be told about the rules (rights and duties) of the organization.
More detailed answers on the questions you have, you can get from the representative of the Fan-club. We recall only, that preference will be given to an active fans.