The correct Way to start out Finding out UI5 will be to observe down below online video sequence on Anubhav Trainings. You typically get started with HTML5, CSS, JS, and jQuery then move to SAP UI5 Framework and Fiori Development with MVC. In the last section learn OData Services over the Gateway server. All of this without duplicate-paste of code

The correct Way to start Understanding UI5 will be to abide by below video series on Anubhav Trainings. You typically start with HTML5, CSS, JS, and jQuery after which transfer to SAP UI5 Framework and Fiori Growth with MVC. In the last stage find out OData Companies about the Gateway server. All of this without having copy-paste of code with line