The Sanskrit word Tantra means "continuum" or "flow," and refers to a highly refined science that harmonizes the human consciousness with the subtle and powerful forces at the base of life.
“In the view of Tantra, the body's vital energies are the vehicles of the mind. When the vital energies are pure and subtle, one's state of mind will be accordingly affected. By transforming these bodily energies we transform the state of consciousness.” - The 14th Dalai Lama
Here are some courses, books, and articles to get you started:
"We should not mistake the Truth with opinions. Many think that the Truth is this or that, or that the Truth is within this or that book, or within this or that belief or idea, etc. Whosoever wants to experience the Truth should not mistake beliefs, ideas, opinions and theories with that which is the Truth. We must experience the Truth in a direct, practical and real manner; this is only possible in the stillness and silence of the mind, and this is achieved by means of meditation."