To start your SharePoint training you must have a development server on which you can practice. There are a lot of ways to setup a SharePoint server and here are just a few.
One you can just recycle a Windows computer and install Windows 2008 R2 and SharePoint 2013 Server. Two, you can go to the Microsoft Azure Preview Portal and startup a preconfigured SharePoint server instance. Three you can go to Amazon EC2
Microsoft Developer Network