When you register a email is sent automatically to the email address you gave. You will need to find this and click the link in order to confirm your account.
New accounts are manually approved. This will happen within 12 hours of you confirming your account.
Thereafter you should be able to access all areas according to the membership level you have purchased.
Note that you can access your account prior to confirming it or it being approved, just that some accesses will be restricted.