Where to find good bicycle maintenance info?
A Bit More Than Basic Bicycle Maintenance for the Average Cyclist, at the How to Fix  Bikes 
Sheldon Brown's site has articles on many aspects of bike maintenance 
The Park Tool website has instructions for most basic repair operations, and their handy bike map is great when you don't know a headset from a handlebar. 
Bicycle Tutor has videos demonstrating many repair jobs
Beachbike's Youtube channel has a lot of information specific to beach cruisers. The videos on internally geared hubs are helpful and clear.