आई am a पहला time user और आई want to गो with amt मॉडल so which कार would be better for me ?

There are many cars available which have AMT. Choosing the best car would depend on several factors like budget, family size, driving conditions and style...etc. You may check the options available from the following link and use the filters as per your preferences to narrow down to the best options: click here

Tata has very good repo in Automatic cars. I would recommend nexon XMA/XZA if money is not the constraint. Otherwise Tiago XZA also comes with great features.