In this article you will learn how to build a Visual webpart in SharePoint 2013 using Visual studio 2012 with Screenshots. See more at http://www.sharepoint-journey.com/visual-webpart-in-sharepoint-2013.html
Installing SharePoint 2013 is a little complex task, you need to install software in a particular order and with correct configuration. I recently found this useful article and it helped me installing SharePoint 2013 server.