Hi Ricardo Sarapura,
As the Nick said to you, look here https://confluence.atlassian.com/jirasoftwarecloud/getting-started-with-jira-software-764477795.html
Also you can do a training https://www.atlassian.com/university.
What product are you referring to? Are you using the cloud version or the server version? Please let me know and I will be able to point you to the right docs and tutorial you may find helpful to get started.
I recommend installing a local copy of JIRA Software on your laptop. Then start to play about. When you get stuck start with the URL that Nick added. Use Google to navigate the Atlassian documentation. Remember that JIRA is just a great big TODO list, like a spreadsheet with each row as a JIRA issue, and each column is a field in the issue. Good luck!
Teams break work down in order to help simplify complex tasks. This is often done iteratively, with tasks being broken down into smaller tasks and so on until the work is accurately captured in well-...
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