Is this course open only to initiated devotees?

No. It is open to all levels of devotees. We do expect the persons registered for this course to follow the four regulative principles and chant as many rounds as possible daily, in line with Srila Prabhupada’s standards for residing in a Krsna conscious community. As long as you stay on the Radhadesh property (ashram, guesthouse, apartment, etc.), particularly in an ashram, you are expected to follow the house rules and behave like a regular temple devotee (take part in morning programs, assist with services when required, respect the local devotees). So no “spiritual qualifications” needed other than enthusiasm and respect for the environment in which you stay.