Create a SQL Authenticated login first with CREATE LOGIN,
then add a user associated with that login to your database by using CREATE USER.
USE [master]
GO
CREATE LOGIN [YourUsername] WITH PASSWORD=N'YourPassword',
DEFAULT_DATABASE=[YourDB], CHECK_EXPIRATION=OFF, CHECK_POLICY=OFF
GO
USE [YourDB]
GO
CREATE USER [YourUsername] FOR LOGIN [YourUsername] WITH DEFAULT_SCHEMA=[dbo]
GO
Then you would need grant permissions to this user, like:
grant select on [TheTableName] to [YourUsername]
Some SQL Server tools you can try: https://www.withdata.com/sql-server/