You don't know the examiner's college now, that's easy. Go directly to Jiangxi Self-taught Examination Network to find out who the examiner of your major is. It may be Nantah or other schools. The self-study exam is the time to choose a major at the beginning of registration, which means that the school has also chosen. You didn't choose a school after studying all the courses.

As for the defense, you'd better make sure your examiner's college first. The latest defense passed. You have to wait for the next defense, which is June 10. The registration time should be June this year, and the defense time is June 10. For details, please pay attention to the website of Adult Education College of Nanchang University. As for the diploma, if the defense is successful, it will be available at the end of this year or early next year.

It is impossible for you to get your diploma in July, because the recent defense time has just passed.

If the result is proved, it is quite difficult for students who take the self-taught exam. Only when applying for a diploma will there be a "graduate information" form. This problem is really complicated. At least at present, there is no institution that can help you make employment recommendation forms.