You will need to become well versed in a number of facets of fruit production. The first source of information should be your local county Extension office. The Extension office is the official branch of the Pennsylvania State University's College of Agriculture located in your area. All other states have a similar institution and Extension office. The county office has a large amount of information in their files on fruit production.
Many counties also conduct informal education programs on fruit production.
In Pennsylvania, there are a series of all day meetings held each winter in various locations throughout the state. Frequently there are also summer twilight meetings at orchards in the area that are a source of information. Another source are the fruit growers themselves. They have banded together into the State Horticultural Association of Pennsylvania to conduct educational and promotional programs for the growers in the state. Each year in January they hold a four day annual meeting devoted to learning the newest improvements in fruit production.