Your Maestro asked why you joined. What happens with what I say?
It's an optional conversation of about ten minutes. Sergio, who wrote the course, reads only what you send, with your name, to learn what to improve.
While you talk
Beside the conversation you see what your Maestro notes, in your words, one line per question. Change any line, skip a question or leave and come back: what you have so far is kept on your home under the course.
What goes and what stays
Nothing goes until you choose "Send to Sergio", and you can send only part. The invitation says how many days what you don't send is kept, and how many days what you send is kept. You can delete what you sent before then from the same page.
None of it changes your course, your progress or what your Maestro knows about you.
If you'd rather not
Choose "Later" to keep the invitation for another day, or "I'd rather not take part" to stop seeing it. Declining is for good: the invitation does not come back.