creating server with Microsoft Server Management Studio
SSMS is only a development and management tool.  To install a SQL Server instance you need do download and install SQL Server.  EG SQL Server Developer Edition.  See: https://www.microsoft.com/en-us/sql-server/developer-get-started/

Or provision a SQL Server database in the cloud with Azure SQL Database.
https://azure.microsoft.com/en-us/free/services/sql-database/