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.
@shelvene