Well done, Guido.
You'll probably find running the "live" image to be a bit slow, but it will at least give you an opportunity to see what Linux has to offer.
Just a few tips, to get used to differences in how things work in the UNIX world as opposed to DOS and Windows:
Directory path names are delimited with forward slashes ("/") rather than backslashes ("\").
There are no drive letters. All files are located on a path below the "root" (top level) directory, regardless of what physical drive they're on. Drives must be "mounted" in order to access them; mounting attaches the physical drive to some directory path below the root directory. A typical physical drive name might be "/dev/sda1" (first partition on SCSI drive A, not to be confused with DOS drive "A:"), but it might be mounted as the root directory "/").
Linux, being a multiuser operating system, sets ownerships and permissions on all files. System files are owned by user "root". (This may not be real apparent running a live DVD.) Users typically don't have write access to other users' files.