This one is a really good one with lots of nifty features. 
The main info hub is the Welcome Topic, and that’s pretty much up to date (apart from the Big Review and Testing Guide ). That’s good for dipping in and out of as and when you like to pick up some extra tips and tricks. 
But all you really need to enjoy the place is to be able to read and write, so don’t worry if none of the extras make sense at first.