Just ask
Ditto on above, try Google on the topic of wiring. Also right HERE is a good start. If you have any question, just ask, especially if it is spacific.
There are many folks on the forum that are very savvy with electical topics. Don't forget to use the search function. It is fun and easy, but it is one little wire or circuit at a time. Get good quality supplies and tools as well. There is more than one way to do things, but as usual think KISS, keep it simple and light.
You can make the Boeing 747 of electical systems, or you can make one that works. You have to decide if you will you fly night IFR? If your engine or instruments are totally dependant electricity or are VFR with basic instruments, will determine the design. 90% of the builders do fine with one battery and one alternators. Some with extensive "Glass" opt for an extra battery to give extra reserve battery power, for example.
Also check the links on Van's web site for builder sites. Look at them all regardless of model. Some have done fantastic wiring, well planned, routed, supported and protected. Others are a little more rats nest (sorry no names). The bottom line is looking at good wiring will bring you game up. I know it has brought my quality up.