crcree une app

hello,
i want to creat an app,
In short it is an application to register restaurateurs and workers on a platform.
First, the user will be asked if it is a restaurateur or a worker.
If the user is a worker he will register with a few questions, if he is a restaurateur he will then register he can apply on the platform to be able to find the worker who is suitable for him.
once the server has registered on the platform each restaurateur who will look for a server will initiate a request on The platform and each server that suits its requests will receive a notification of which they can accept or decline the request.