Use cases
Four businesses, four different jobs for a website.
Each of these is written against what the platform actually does for that kind of business — which modules carry the weight, and what the setup looks like.

Restaurant
Restaurants
Covers booked while the kitchen is running — table allocation, holds and deposits, without the phone.
Bookings · Forms · Statistics
Shop
Shops and makers
Physical, digital and subscription products, one cart, and hosted checkout through Mollie or Stripe.
Selling · Payments · Statistics
Events
Events and venues
Occurrences, ticket tiers and QR check-in — with availability drawn at runtime, never cached.
Tickets · Selling · Forms
Studio
Studios and services
Enquiries that arrive validated and sorted, and a calendar for the call that follows.
Forms · Bookings · StatisticsStart
Yours is probably a mix of these.
Most sites use two of the four. Nothing here has to be decided before you start — turn a module on when you need it.