Interested in seeing what using the site is like? The best way to do that is experience it, and the best way to experience it is to register and play for yourself.
Be careful when you enter your information. Most of it is difficult to change later. Some things, like your Date of Birth, cannot be changed without VERY good reason.
Your Username needs to be unique. If you choose something you do not like or make a mistake while typing, you have one free username change. After the free change, username changes are less likely to happen without very good reason, and may be denied altogether.
Most of your other information also cannot be changed without staff assistance. The only exception is your password, which you can freely alter from the Miscellaneous Settings page. Still, be sure that your password is both strong and something that you can easily remember. Using words like "pokemon" or "123456" is not safe. The safest passwords use a combination of uppercase letters, lowercase letters, numbers, and symbols. Your e-mail address needs to be correct because you will need to validate your account to fully join the site. It is one of the three steps you need to take in order to ensure that your account is not deleted.
This guide is incomplete. It is being extensively written and will be completed as soon as possible. Please keep checking back for more updates.