Let's presume that you have an installed OpenTRS system on your system and of course you do not want to waste too much time and see results quickly.
First you have to start your favourite webbrowser and have a look at http://localhost/otrs/index.pl
You are the root user of OpenTRS now. That means that you can do everything! You have the power, you are admin of the system. Normally you will not want to work as root and of course you need an account for all agents. So the first thing is to go into the admin interface.
The admin interface is the central of your power. You can create and delete users, groups, queues and all sort of usefull stuff here. Browse around and give it a try. But for now we want to create a new user at once.
Now add the new user to the 'users' and 'stats' group or some other groups.