Recently I've received so many questions about how to join our Nath Sampradaya, how to enter to Natha's Community etc. Generally it is a good, important question and I'm going to consider it.
First of all it is necessary to be aware of the role of Guru in the Nath Tradition. As Siddha-siddhanta Paddhati says, Guru is the essence of the Siddha's teaching (the teaching of perfect yogis):
आज्ञासिद्धिकरं सदा समुचितं सम्पूर्णमाभामकम्।
पिण्डे सर्वगतं विधानममलं सिद्धान्तसारं वरम्॥
भ्रान्तेर्निर्हरणं सुखातिसुखदं कालान्तकं शाश्वतं।
तन्नित्यं कलनोद्गतं गुरुमयं ज्ञेयं निरुत्यं पदम्॥ V.93 ||