Shopify expert - adjustment on website

Online store (using Shopify 3rd party theme) that offers services for customers to pay. Goal of the project is help people to create their business in reality and help them step by step. It's already created in Shopify as multipage website (6 exactly) and needs adjustments. I want to have in the home page image banner (3 images) one of them has with its design a button to click on lead to services page. Service page each service

There is a page called (Book Now) I want so that customers be able to pick a time between 7:30 - 3:30 pm (GMT+3) my time and automatically make it scheduled on Google Calendar with my Boss's account no need for approval