FB Live Scheduling Questions

I'm contemplating setting up a regularly scheduled FB Live Q&A session for my past painting students and others who might be interested.  Topics can cover painting materials and process (both studio and plein air), marketing and so on.   I need help in deciding day of the week, time of day and length of session.  Your replies will help me.

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* 1. What day of the week would be best for you for an online session with me?

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* 2. What time of day would be best? (Time zones may affect this!)

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* 3. How long should a session be?

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* 4. What topics would you be interested in?  I can teach, demonstrate, do a critique, show my paintings, answer your questions -- the sky's the limit!

T