Oh Please! Silverfast is no more difficult to understand than Photoshop.
Do you understand Curves?
Do you understand Levels?
Do you understand Color Management?
If you answered "no" to any of these, then you are not yet beyond the basics, and you'll have a difficult time no matter what software you use.
However, if you answered "yes" to all three, then you know all you need to know to use Silverfast, Vuescan, or any other scanning software package.
Ian Lyons published an excellent set of tutorials on working with Silverfast on his website, The Computer Darkroom:http://www.computer-darkroom.com/home.htm
The most important thing to understand is how to correctly setup Color Management in Silverfast. Ian makes this easy as pie.