Open HR then Employees, when your plan includes the HR module. An employee is a person in your organisation; it is not the same as a MAYA user, which is a login account.
The contract type is optional, but a new company has NONE: contract types depend on your country's law, so nothing guesses them. Set them on the Administration, Human resources, Contract types screen before choosing them.
An employee is not deleted: they are deactivated, archived, and reactivated when needed, even once archived. Every change of state leaves a trace.
To create many employees at once, use the guided import: the department and contract type are looked up there, never created.
The record an employee fills in themselves can go through an approval: see HR then Profile approvals.
PlansIncluded in plans: Business, Groupe, Entreprise.