The tools you need to develop MS SQL databases and to connect to our servers are available free from Microsoft.
SQL Server Management Studio is free from Microsoft and is the best tool for managing your databases. Click the link below to download it:
https://docs.microsoft.com/en-us/sql/ssms/download-sql-server-management-studio-ssms?view=sql-server-ver15&viewFallbackFrom=sql-server-2019
You can of course use any other MS SQL management tool you like.