Thank you very much for your interesting.
Yes I am a teacher as well as a learner to use moodle.
I am now attending in one moodle class which is support by GIZ (one German Organization).
In that class, we can get the web hosting to edit our moodle page.
So, I can able to administer able to add plugins during our learning period.
I haven't had a look at the Quiz and Assignment features.
As your suggestion, I will try to look at the Quiz and Assignment features.