If you're trying to learn about the path of non-dual spiritual truth, don't limit yourself to blog posts and Youtube videos. Educate yourself by reading the ancients! In the Hindu tradition (which I come from), read the Bhagavad Gita, the Upanishads, Yoga Vasistha, the Ashtavakra Gita, Ribhu Gita, and more. Try to apply, think about, and feel these texts. Ask questions about them. Read commentaries on them. These texts are huge treasuries of amazing wisdom and depth written by unquestioned masters, and they have lasted centuries or even millennia for a reason. You are hugely missing out if you limit yourself to people living today.