As a Global or SharePoint admin, you can follow the steps below to access the SharePoint admin center.
Go to https://admin.microsoft.com.
Sign in with a global or SharePoint admin account. The global admin role has all the permissions of a SharePoint admin.
Select SharePoint under Admin Centers in the left pane.
If, by chance, you open the new SharePoint admin center and want the classic view, you can select Classic SharePoint admin center, in the left pane.