Pharmacies are a critical element in the Australian legal cannabis sector.
The TGA has no documents prepared specifically for pharmacists.
They have some Information for Health professionals, but I could find no pharmacy specific notes.
The Pharmacy Guild has a course.
Patients will normally be offered some way to access the medical cannabis being prescribed by their doctor.
Most clinics/doctors will direct you to a pharmacy that specialises in cannabis prescriptions, but when a patient tries to obtain their medicine from their local pharmacy, there have been several reports of patients experiencing difficulties.
The only pharmacy I'm aware of currently that brands itself as a cannabis specialist is Astrid Health in Victoria.