Perhaps you should try other options first before considering ST. Such as applying other companies or intern at a good company to gain experience...

The training are online courses, so there is no "teacher" to guide or even provide useful advice to help you along. The projects and your performance are assessed by the manager.
Don't expect this manager to provide you with constructive feedback unless you are able to gain his love and become his favorite staff.

If you join, it is a good chance for you to learn about the harsh reality of working in a bad workplace and under an unreasonable manager. You can experience workplace politics, micromanagement, unfairness and more.

They change your area of specialization anytime they want. So if you are someone with specific area of interest or goal. Then you might need to take this factor into consideration.