I have taken over management of a team using free Jira. The previous manager set only themself as a site admin and has now left.
All the guidance I have found, relating to changing roles, depends on there being other admins already. We do not have that, just users.
I have tried to change my own access through my account settings (which, predictably, didn't work).
I am reluctant to create a new organisation if there is any other way to transfer the site admin rights.