I recall that you will not be starting lessons till September, and it is too soon to register for next year's exam. At the end of this year's session, at the end of August, all registrations in the Students group are cleared out and students who wish to take part next year will need to apply again. So it would be better for you to apply here next year, a few weeks before the exam date.
You can, of course, continue to visit the Spanish forum in the meantime, but will need to post at least one message per month on average to keep your account open until next year's exams start. If your account lapses, you can rejoin nearer the exam date.