Have you contacted your county agricultural extension office? They can probably provide you with some numbers (expected yield, ounces/lb per X row of planting, etc.) for your local region.
There's also bound to be a professional organic growers' association near you. These people would be the ones who show up at local farmers' markets, whether those farmers' markets are all-organic or not. An internet search on "community supported agriculture" will also give you the names of local growers/producers.
As to taking courses, I would recommend a basic grounding in bookkeeping (community college?) and required record-keeping for anyone starting a business. Whether you acquire this knowledge from books tailored to your state/county or from a class is dependent on your own situation: time frame, need to ramp up, etc.
Have you found yourselves with excess produce? Do you have any idea of how much you'd be producing over what period of months? Etc.
A big undertaking, but probably a tremendously fulfilling one!
Sunset Zone 17, USDA Zone 9