The first step would be to file articles of incorporation under the corporations or food and agricultural code which would allow you to register your business as a non profit. Next you must file the appropriate tax forms and obtain a business license or permit depending on the local regulations for the city and county. Then you will have to set up a regulation system because you can only distrubte marijuana to those that have a medical need. From there, you’ll just need to follow the regulations on business and rake in the money!
Many cities and counties in California do not even want these dispensaries. That being said, you have to get a seller’s permit, pay the obligatory fees, and have a insured business and location available. You need zoning permits and you need a system in place that verifies all potential customers because fraud will subject you to severe federal penalties. California is one of the most difficult states for marijuana dispensaries to operate.
The rules and regulations regarding regarding the lawful sale of cannabis are complex and as of 2016, in the process of possibly changing in a radical way. The best advice to give in a limited numbers of words is this: Find and consult a reputable lawyer and have them look into the specifics. The cost of a lawyer is pennies compared to the possible ramifications of selling cannabis in an unlawful way, even if you thought you were doing everything right.