Another pair of eyes is definitely good. I've been training more than ten years now for all sorts of purposes from basic obedience to utility work (farm/herding dogs) to some sport (haven't gotten incredibly deep into that yet though) and I still have little things I do that friends and fellow trainers will point out to me. At the very least, I would get friendly with someone who has experience training and take some time to work together. It's great not only for distraction work, but also for critiquing your method, and you'll probably pick up a lot of good habits by working with someone who has experience as a trainer.
As far as books, it depends on how you want to train. I haven't worked with prongs for years so if you're going that route, there are others who still train with them that will have excellent resources to look into. If you're looking more positive reinforcement, Pat Miller's book The Power of Positive Dog Training is a good resource, as is pretty much anything of Karen Pryor's. Pryor has mounds of books, videos, and tutorials pretty much everywhere. The youtube channel Training Positive is also a good one and I personally like visuals.
For a first time dog owner, I can't recommend Patricia McConnell's book, The Other End of the Leash enough! Great study both of dog and human behavior and the ways our interactions work together and clash horribly as well as how to make communication much clearer and use your dog's own natural behaviors to your advantage. It will definitely help give a better awareness of your reactions and body language around your dog as well as the underlying meanings of many of your dog's behaviors.
The only thing I'll say about training methods is if you go the prong route, especially if you have never used it before or if you are a first time dog owner - get a very experienced trainer you are comfortable with. It is not a method for a first-timer to muck about with and it can lead to dangerous results very quickly if you don't know what you're doing. Personally for first-timers, I'm partial to the positive reinforcement route because it is much more forgiving and in my opinion, much more versatile.