To get you started, Palm includes a getting started guide in English and Spanish, and there is the Help application on the Pre itself. But if you really want to learn about your Pre, like I do, then you will want to download the Pre User Guide from the Palm Pre Support website.
There is a lot of good information in there. For example, you can charge your Pre by connecting the microUSB cable to the wall charger (fastest way to charge your Pre) or you can connect the microUSB cable to your computer (much slower than the wall charger option). There is also a specific note in the guide about connecting the Touchstone charger via cable to your computer.
"You can also charge your phone battery by connecting your phone to your computer using the USB cable. Charging this way takes much longer than using the AC charger. Do not, however, connect the Palm Touchstone charging dock (sold separately) to your computer."