Hi herminder bedi •, Welcome to Microsoft Q&A forum.
As I understand, you want to perform migration of SQL server from On-Premises to Azure.
Perform Migration to Azure SQL Managed instance using DMS as per below documents:
Offline: https://learn.microsoft.com/en-us/azure/dms/tutorial-sql-server-to-managed-instance
Online: https://learn.microsoft.com/en-us/azure/dms/tutorial-sql-server-managed-instance-online
For Azure Data Studio ,refer https://learn.microsoft.com/en-us/azure/dms/migration-using-azure-data-studio?tabs=azure-sql-mi
For Azure Migrate part, I would recommend you to raise a separate question with the tag so that Migrate team can help you with the solution.
Hope this helps. Let us know if further queries.
Thanks