For the purpose of the tutorials, we'll assume you're going to use JIRA Core Cloud, as it's the quickest to set up. If you want to install a JIRA Core Server instance, please refer to the installation guides on the first step of the JIRA administrator guide.
JIRA Core administrators should complete this tutorial to understand the basic concepts of managing a JIRA Core Cloud site.
Here's what you can count on learning:
How to set up a JIRA Core Cloud site
How to add users to your site
How to create a project and customize it
How to manage permissions
By the end of this tutorial, you'll have a fully functioning JIRA Core Cloud site, several users with different access permissions, and you'll have created your first project.