I have been a practitioner since the beginning of 2006 / a teacher since the beginning of 2015.
Still can`t say I got an advance level as I think it is a long way.
My first step at hatha yoga was in 1993 with a private teacher in Ukraine. We had about 1 year practiced.
For me yoga is Sadhana.
I studied yoga in Ukraine in different schools with various directions/styles as: Yoga 23, Classical Hatha Yoga, Vinyasa , Ishvara, Laughter Yoga , Women's.