Welcome. That is a beautiful piece of
land. Here is what I would do:
1. Read. There are dozens of great threads on this forum that talk about the first steps to take in
permaculture. Just do a quick search and you'll have all sorts of great information. From the nature of your questions, it's clear that you would benefit from reading a couple of good
books and reading quite a bit on this forum and other web-sties.
2. Observe. Most people encourage you to observe your land for at least a year before you begin designing, moving soil and creating earthworks, and certainly taking your time before investing in trees. You need to intimately observe the way water moves across your land, the way sunlight hits your land, find out the various natural micro-climates (where it's hot, where its cold, where it's dry, where its windy . . .). Don't jump in bed right away --- take your land for a number of dates and get to know her well first.
3. Visit neighbors and see what they are doing. It's really impossible for people on this forum to give you specific advise about plants and trees without knowing more about your context. But your neighbors have been growing and managing their land for years. Take advantage of their knowledge and experience.
4. Work in the order of greatest permanance. Thus, complete your earthworks and water harvesting features first before you start planting trees. Think through where you will eventually locate structures like roads, fences, buildings, etc. Think through how you will capture fertility, sunlight, and water, and then structure your land accordingly.
5. Build soil. You can plant veggies and annuals, cover-crops, and other plants without making a long term commitment to their location, but as you do so,
compost like crazy, capture biomass for soil building, and prepare the land for the crops to come.
6. Draft a design plan. Walk the land, get a feel for what would work best, and draft it on scratch paper. Next week, you'll do the same again and you'll find yourself thinking differently about the design. It just takes time and you want to give yourself space to change your mind (on paper).
7. Start a nursery. Begin growing plants in pots that can later be transferred to the food forest. In a year, when you've got your earthworks completed and your design finalized, those plants will be ready to go into the ground.
8. If you haven't taken a
Permaculture Design Course (
PDC), do so.
Best of luck.