I think the only country with as liberal of cannabis regulation is Canada and maybe Thailand. Not sure about other countries.

Medical use is still covered in much of Europe, though as far as I’m aware solely as a last resort for chronic pain. I think medical cannabis can only be consumed through weed pens as well, pharmacies aren’t going to give you joints.

Though I’m fairly sure a doctor would first attempt to find the cause of your insomnia because symptom treatment is of secondary concern. That might make for an uncomfortable first weeks.