Hi @Shyam Muthiah ,
Welcome to the community!
Please read this documentation
You can start learning Jira from https://www.atlassian.com/software/jira/guides/getting-started/basics
many good information were already given here - in case you are interested in some further reading as for the Workflows, for example the "Tips and Traps", I will paste you a couple of links here.
Please let us know if you were successful in adding users to your project and with workflow editing.
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