Don't expect any sympathy from the Linux community. In my experience, Linux gurus seem to think that anyone who doesn't just instinctively know how to administer it, is a luser worthy only of abuse, scorn and derision.
Use GUI file manager the same way you would under any other operating system.
Install programs:
Click on K-Menu -> System -> Synaptic (Package Manager)
Select the program you want and click "Install"
Linux tutorial:
Click on Firefox icon. Type in http://www.linuxplanet.com/linuxplanet/tutorials/
Switching to Linux isn't seamless. There are significant differences between Linux and Windows. But then there were significant differences between Win9x and WinNT/2K/XP and people seemed to get over them.
And rather than dealing with popups, viruses, worms, broken patches, crashes and expensive software you can get right to work.
The only people that get scorn, derision and abuse are those that refuse to learn or consistently spread lies and FUD.