The steps, in order, with nothing implied that Koovira does not do.
Set your event types, working hours and buffers, then share one link and let people book the slots you actually have free.
Four or five steps, and what each one actually does.
Answered plainly, including the things Koovira does not do.
No. This page finds providers; the open times are on the provider's own booking link, which comes from their calendar.
Yes. Create booking links, event types, working hours and buffers from your Koovira calendar, then share the one link.
Reminders are configured per event type in the scheduling workspace. Nothing on this page promises one for a particular booking.