Best thing I can tell you, read all you want, but OBSERVE and follow wires and such BEFORE you actually do anything. look how things are put together.
Many manuals (incluing the factory manual) will have you driving across town to go around the block, sometimes for the simplest things.
the more time you spend prepping and knowing where things are, the easier time you will have, also many will only offer "generic info" as there may be several options for said vehicle, you have to figure out what pertains to your situation.
Best advise, look on Ebay, get a Factory Service manual (FSM) Haynes, Chilton, Mitchell have their place, but the FSM is your best and most complete resource, the Online Manuals are compilations of different sources, and many times misleading.
FSM is $$$ well spent. Especially for the novice
Kevin