Here are tutorials and Scribus documentation that will get you up and running quickly.
Scribus offers its software in two versions: stable and development.
Download the stable version if you want to work with tested software and avoid surprises.

ubberdave / Flickr
Download the development version to test and help improve Scribus.Download Scribusfor Mac, Linux, or Windows.
A Simple Introduction: Scribus Video Tutorials
ubberdave / Flickr
Hands-on walk through.
Eases you in gradually.

Videos make it easy to follow along.
Could have covered more features.
Each video in the set takes you deeper into the core concepts of Scribus.

The first video starts with the fundamentals.
The second video delves into the Scribus story editor and the beginning of stylesheets.
The videos are in Theora/Ogg format, which is supported in Chrome, Firefox, and Opera.

If you use a different net surf tool, refer tothese instructionsbefore viewing the videos.
Project-Based Learning: Kevin Pugh’s YouTube Demonstrations Using Scribus
Broken into manageable parts.
See how things should look and work.

Could have been longer and covered more.
YouTuber Kevin Pugh created an excellent eight-part video tutorial for Scribus beginners.
The first video gets you set up with the controls and configuration.
From there, you dive into using Scribus for real projects.
In-Depth Information: Hexagon Scribus Tutorial
Well organized.
May not be the best place to start.
TheHexagon Scribus TutorialPDFcontains information for beginner, intermediate, and expert users of Scribus.
Information From the Source: Official Scribus Wiki Tutorial
Step-by-step introduction.
Feels more like documentation than a tutorial.
You’ll learn how to use Scribus desktop publishing software and aboutdesktop publishingand printing in general.
This course was designed for an earlier version of Scribus.
There may be some differences between it and the current stable version.
Old, But Worthwhile: Sott’s World Scribus Manual
Excellent screenshots and diagrams.
Great core concept information.
Mostly an intro to the tools.
For a beginner’s tutorial in using Scribus for publication design, check outSott’s World Scribus Manual.
This manual was written for an early version of Scribus.
The icons and menus also look a bit different.