Welcome the the forum Albert..
My suggestion is to immerse yourself in your land and 'permaculture' .. What do I mean by that? Well....
All parcelas of land are unique unto themselves, as you are unique also. So, there isn't a 'one size fits all' answer.. Your questions are broad, and therefore the answers coming back to you are are reflecting that.
Let us know more specifics.. Like soil type, orientation, gradient, altitude, temperature varients, percipitation, what there is already growing, and what it is you want to do specfically etc..
'Permaculture'(from my perspective) is a wonderfully, massive, broad and complex topic, that all fits together through a unique symbiosis between the individuality of all the things listed above plus how you (the human) intergrate and communicate what you require..
Step by step, no rush, meditate, learn to ask the land itself, what is best, and learn to listen to the answers.
We are all learning everyday, and we are sharing our understandings as best we can.
Best regards and happy learning!