Mukta Tantra Yoga is the best school to know about what is Tantra. For me it was new to learn but it made me more clear about my vision and to know and to go on the spiritual path.
How to be clear in the life, vision and to know yourself and if wanna go for the spirituality this is best school to choose and have the benefit of it. I will recommend Mukta sir and Marine as they are the best in it.