Jnana means knowledge. Dr. Sharad Wagle describes jnana yoga as the path for the intellectual person: studying the scriptures, as this podcast does.
He gives its three stages. Shravana is to hear these truths, which is like looking into a mirror that shows us as we truly are. Manana is to reflect on what you have heard, ask your questions and answer them. Nididhyasana is to keep thinking of it, because it is easy to reach the truth and easy to slip, and the work is to stay there longer and longer.
Knowledge also gives every other practice its strength. Many of us do rituals without knowing why, and the mind wanders. Done with knowledge of their meaning, he says, they lead to concentration, and then you can meditate.
Start with How to control the mind, or join the Gita Study Group on WhatsApp. The episodes are below.