Divination is seeking Wisdom and knowledge something as simple as a yes/no answer or positive or negative in a form of swinging motion and starting with easy questions working with it every day will help you build your pendulum work using the pendulum divination is just a way of unearthing hidden info that's is locked in our subconscious Minds.
Deep down we will already know the answers at a subconscious level but doing pendulum work will just help bring that wisdom to light so that it may be used for our own greater good.
You can connect with them just like the crystals diff shapes sizes stones etc, the way it feels in your hand! Some say to use domanant hand too and was always said to but being a lefty I automatically want to put it in the right hand and felt really forced putting it in my left so I feel what ever works for you do what you feel is more natural and Free flowing!
I love working with pendulum when I feel I need that extra push and guidance I always take a few minutes to clear ground and centre before using and especially free from distractions lol little tricky in our house with a family of 8!