Quick Jira Customisation for Permissions

Hi there, I have a Jira set up for a software development company and need to set up permissions accordingly. I would like someone who has recent experience with Jira and is well versed at Jira set up. The job outline is simple and as per the below: I need to customise the Jira company account user permissions to the below: Three groups - Admins - Guests - Developers I need to redefine my permissions so that: - Admins can do anything. - Guests can only see and work on projects they have been manually assigned within/added to. - Developers can only see and work on projects they have been manually assigned within/added to. The creation process should be: - By default, new logins are guests group and permissions only. - If a new login is a developer - we will then add them into the developer group and remove them from guest. If you could also recommend other changes that are very common when setting up Jira in other projects you have done that would be appreciated.