How can I set fixed appointments ?

I have an other question. I can’t arrange the appointments I need

I would like to set:

4 appointments only:

30mn preparation 9h30-10h30

appt 10h-11h

30mn prep 11h-11h30

appt 11h30-12h30

break 12h30-13h00

appt 13h30-14h30

30mn prep 14h30-15h

appt 15h-16h

How can I do?

Thanks for helping.