You perform most of those tasks in the Remote Systems view.; Connecting to and working with remote systems explains some of the basics of working in the Remote System Explorer.
By default, the z/OS Projects perspective includes the Remote Systems view, where you can perform several of the mainframe tasks that were listed earlier. This perspective also includes views that allow you to get the output of a specific job and display it. Working with projects and subprojects explains some of the basics of working in the z/OS Projects perspective.
Once you learn about these perspectives and the benefits of using them as you work, you can proceed to customize a perspective if you want to close default views or open other z/OS related views. See the related reference below for information on the content of each perspective and instructions on customizing the perspective.