CAD/CAM/CAE

In this competitive business environment, it is essential for a manufacturer to maintain error-free production and reduced time to market' to stay ahead of competitors. CAD/CAM/CAE has emerged as a critical application for manufacturers.
It offers ample opportunities in industries like Foundry, Sheet metal industry and Automotive industry.
Please refer to the link for more details:
https://www.shiksha.com/it-software/cad-cam-cae/articles/your-career-after-cad-cam-cae-blogId-4568

Refer the article below for details:
https://www.shiksha.com/cad-cam-cae-article-4568-1

Yes, in designing sector in the countries like Ukraine, Canada, etc., where senior design engineers are required in large numbers.

Central Tool and Training Centre (CTTC) is a better option.

MBA in IT will not lead your son to software development, but it will lead him to software marketing and other infrastructural maintenance.
All the best.

Interior design is a course that helps you to modulate the interior space of a building and AutoCAD is a software that helps you visualize your picture in a three dimensional manner.

Yes, sure. You can be appointed as a CAD/CAM engineer. I would suggest you to learn ANSYS as hyper meshing is one of the technicalities used for analysis.