To find appointments that have been booked, you can find them in two places:
Appointments Tab: Here, you'll be able to see Upcoming and Past Appointments in order of booking date.
You'll also be able to see if clients have uploaded pictures or left any note when booking:
Calendar Tab: Here, you'll be able to see appointments in calendar view.
Choose Stylist to only see appointments for a particular stylist (if there is more than one at your salon)
Choose View All Appointments to see all appointments for that stylist. You can also choose to see only Confirmed or Unconfirmed appointments (this is a great way to see which appointments you still need to confirm).