To get started, I recommend you review the Sweet Cherry Orchard Establishment and Hazelnut Orchard Site selection publications (free to download or view online). Both are crop specific but provide a good overview of what you need to consider in terms of soil and climate when establishing an orchard. You will also find some relevant information in the Growing Tree Fruits and Nuts in the Home Orchard publication. OSU Extension publications on tree fruit and nut production can be found in the OSU Extension Catalog at https://catalog.extension.oregonstate.edu/topic/agriculture/tree-fruits-and-nuts. I also recommend you reach out to Logan Bennet, the Small Farms Program Coordinator for OSU Extension in Douglas County.