One of the fun things about building electric guitars is wiring them up. Factory wiring tends to be simple, minimizing the amount of fussy handwork required. Many manufacturers keep strictly to 'classic' designs, seldom if ever changing anything. These designs are generally simplistic, often crude or even stupid, and sometimes outright flawed. There is no need for you to do this. I don't. Here are some of the things I have done over the years. I don't claim to have invented any of this, although some of these schematics I have never seen anywhere else, and had to derive them myself.
Although sold as a hardwood, poplar is actually softer than some pines. It often has an unattractive green color, although the grain patterning is usually nice. The grain itself is tight, requiring no filling. Poplar is suitable for stained and solid-color finishes that hide the natural color. Poplar requires a hard protective finish like polyurethane.