Why you want to design is as important to permaculture; perhaps even more important than the how.
Why? I live on 7.5 acres in east central Illinois. We have a garden but it is not optimized. I would like to create something that is beautiful, self-sustaning and healthful for me and my husband and for the soil/environment. I'm also thinking about maybe chickens and milk goats. We have two wells (but no ponds or streams), raspberries, blackberries, blues, fruit trees, a little wooded land, and are surrounded by GMO cornfields. I am retired and somewhat disabled and my husband works fulltime. Where do I begin? (I have ordered Sepp's book.)
We live in an 80+ year-old farm house, have a three story barn, and an old summer kitchen (now a shed) with a root cellar. The root cellar hasn't been used in decades and we know it is inhabited by possum. We haven't even looked down there. Seems a shame to not use it but my husband is convinced there are dead animals and maybe rats there as well. I thought about filling it up with snow in the winter to see if it could be made into an ice house for summer storage. We are both past middle age.