I see some comments recommending wordpress but wordpress is a security problem, especially if you're using 3rd party plugins. It is such a bad problem that their are 'wordpress security' applications but even then wordpress sites get hacked all the time. If you are going to use it, it is best to let some other host handle it for you if you don't know a whole lot about what you're doing.

There are many, many other content management systems out there. Some are lighter than wordpress and some heavier. They are all about posting and managing content. Most of them have some sort of user and authoring system. Once you're webserver is set up, many are written in a mixture of php and python so setting them up is generally drag and drop with either minor configuration file edits or wizards. Many of them have sections that you can set up using a labeling/tagging system. Most of them allow you to have the 'stories' as private or draft where you have to actually click publish before people can view them. Some have user roles systems where you can limit viewing and even editing between different roles for sections.

Generally, once their setup is done, they are point and click to do everything.

Here's a nice list of FOSS CMS' (which includes Wordpress of course).