It is helpful to have a mentor, but not entirely necessary. With Sahaja Yoga meditation you can be your own teacher.  The meditation unlocks the pure knowledge which is within each of us.  Intuitively we begin to know what is right and what is wrong.  You feel which techniques work for you and which don’t.   But, at the same time, you will always benefit greatly from the experience of others.  Through group meditation, local classes (link), and contact with those who practice Sahaja Yoga, you can get support—your questions can be answered and your growth can be accelerated.