Just buy the book, man. It'll tell you how to safely wire a subpanel or main panel, give you the calcs for figuring wire size, tell you how to set up duplex outlets in line with a timer, and generally give you the minimal theoretical background you need to know to do electrical work. There's no shortage of free advice on the internet, tons of people could tell you how to do this safely, but there's no substitute for learning something as important and basic as this. Not only will you save yourself bucks and outrageous lies dealing with a professional sparky, you'll come out with more knowledge than you came in with. Then when you've got a plan (cover to cover, don't forget!) come back and tell us what it is so we can check you and you're off to town.
Not trying to be unhelpful or withhold secret 'lectrical wisdom of the sages. I just see you going down the same road I went down which is fucking with (cue booming Gandalf the wizard voice) POWERFUL FORCES I DID NOT UNDERSTAND, costing me more heartache than a $20 book and an afternoon would ever have. I didn't start any fires but I cost myself days of labour because everything I did I did twice.