Actually you will need to contact an admin, but not straight away. When you apply to join the forum as normal, you'll be given full instructions on what you need to do to join if you're a reader/reviewer only (along with forum rules). You just have to make sure you actually read it all, something which most people don't seem to do. Once you read the information, and follow through with the instructions, you'll be approved to join the forum. If, after you try that, you still have further questions then just send a PM to either myself or DemonGoddess061.
Remember that you need to follow the instructions exactly or you won't be approved to join. This is done to keep spambots out, which daily try to join and I keep blocking.