There are three ways you can get your users started in Confluence:
- Add users - manually add accounts for people who will create pages and blogs in your Confluence site
- Invite users - access an invitation link or send an email directly from Confluence to invite people to create their own account
- Allow users to create their own account - change the User Signup Options to allow users to create their own account.
New users are automatically added to the 'confluence-users' group. You can add them to other groups too - see Add users to groups.
You can also allow 'Anonymous' access to your confluence site and spaces - see Modify Global Permissions.