[drupal-support] Advice needed for drupal

Greetings;

I have installed and briefly worked with drupal but I don't exactly see how to set it up for what I want to do.

My wife is in business and the amount of spam she gets on any regular email account makes it almost impossible to use it as a practical means of communicating with her clients.

What I want to do is set up drupal so it is a tightly locked down forum and info site that she can use as a means of communication with her clients.

My question: Is there a doc that details the steps I need to do to make drupal work this way?

Any hints, tips, pointers will be greatly appreciated!

Many TIA! Dennis