We are using SharePoint Online (Plan 1) at the moment and we have not used any AD services before so all the users and licenses have been managed through O365/SPO admin portals.
Now we noticed that there is an option to sign up for Azure AD. We have learned that it should be free because we have a paid plan and we would love to sign up and see what's it about and get familiar with it. Before that we wanted to make sure that if we sign up for it, will it initially make any changes or break anything on our current setup? We do not want to risk breaking anything at the moment (O365/SPO users and licenes etc.).