I've used wood chips a few times.
Fairly simple to use...lets the wood chips sit in your liquor for a day or so ahead of time so the chips absorb as much of that bourbon or whatever flavor your using, then pitch the chips and bourbon right into the secondary.
Some people use a muslin bag to contain the chips, but I just added to the secondary and had no issues whatsoever.
Thinking back the only thing I wish I'd done when using wood chips was use more of them when I did it as I didn't get a ton of character from them. So don't be shy...
Maybe list out your whole recipe so we can see it and someone can suggest a proper amount of chips to use.
Best of luck.