Id get used to using the factory setups first and play the pico lots ... before getting into customisation.
you'll find you can do most things without resorting to much/any customisation
also, to customise, you need to have a good understanding of what the setups do and how.
... also, you will learn that there are good reasons why the factory setups work the way they do, that are not at first immediately obvious.
once you have that - fire up workbench and look at the connects and agents and its pretty straightforward to see broadly whats going on. (cross reference to the EigenD reference here )
there are quite a few 'gottchas' (e.g. giving wires from key groups to rigs a unique channel number), but if you shout if you have any issues, someone will help you out :)
but seriously, play lots and enjoy the factory setups...
the customising side, is a pretty steep learning curve, and if you don't balance with lots of playing, can become a bit frustrating.
also might want to try my PicoMix setup, its a bit different from the factory setups, see post at g+ PicoMix07
(sorry in advance for poor/no documentation!)