Konsole is just a front-end to the Linux shell, like a "graphical window" to use the console. For help on how you use the console, or shell like BASH (Bourne Again SHell), visit www.linuxcommand.org
, it's pretty good site for learning the command line.
If you mean getting help on using the Konsole terminal emulator program itself, I think it has docs either on KDE's website/it's own website or in the Help menu. But I assume you meant help on using the shell environment, and for that Linuxcommand does the job. It depends a bit on which shell you use (bash - probably the most common on most biggest Linux systems, or ksh - Korn SHell, or csh - C SHell, or something else) but basically they work the same way, and for that you'll get a good picture from Linuxcommand and using Google.