“How do I start?”
I would say that paying attention, indeed, cultivating your attention, is key. If you don’t already, start meditating. Do the basic mindfulness exercise of being aware of your breathing, of your forehead, between your eyes, or wherever comes easiest for you.
With time, you might want to add some questions to your practise as you grow more and more acquainted with calm and awareness. Calm and awareness usually beget one another. For there is a Presence within Silence, and being aware is how you will come to find it.