Hi @hyeslee ,
Welcome to Atlassian Community.
Did you clicked on Create button on the top ? If so, once you click on the Create button, you need to select the project (hopefully, project is created). You can follow the steps as mentioned in the below link and you will be able to create your first issue in JIRA.
If you are still facing the issue, then please share the screenshot of the JIRA here, where you are getting the above mentioned message.
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