Dina, a couple of thoughts on the protection of new plantings. Have a look at the bone sauce made by Sepp Holzer. There's a great video on permies showing you how to make it. It is quite simple to make and a little goes a long way and lasts a long time. I have used it on most of my new woody plantings and it seems to be deterring nibblers. However, we had a vole explosion three winters back and they tried to chew anything that I hadn't protected. I use 1/2 inch hardware cloth cylinders around all new fruit trees. Only lost one tree to girdling after I started using these cages when the snow was so deep the little beasts burrowing under the snow came out above the top of the cylinder. UGH! The cylinders take little time to cut out and I use baling wire to tie the ends together or you can even use twist-ties. I also use a similar mesh made of heavy duty plastic. It's easier to cut out and seems to be as effective in stopping the nibblers. Bought that at a local big box store. I used cement reinforcing wire to make large cages around several fruit trees to keep the deer off of them until they got large enough to hold their own against deer browsing. These worked well in keeping the deer away.
As for grasshoppers, consider Bill Mollison's approach- you don't have too many grasshoppers, you have too few turkeys. I don't run turkeys myself ( just chickens, so far) but I understand turkeys will gladly eat grasshoppers whenever/wherever they are found. I don't mean to complicate getting your system going but just food for thought. I know hoppers out west can really go through population explosions some years. Turkeys or other birds could turn that surplus into food.
My suggestion for starting, based on my own experience of starting basically from scratch, concentrate your efforts on a given area within a larger design framework. I spread myself far too thin in the early couple of years here (now in year 7) and have been concentrating on smaller areas since. Beware, not all techniques identified as permaculture will necessarily work for you in your context. I still like Geoff Lawton's advice to develop your water systems in place and access before mass planting of vegetation. I flunked on that one too and am still playing a bit of catch-up five years later. Think zone 1 and work outward. That way, hopefully, implementation of your plan won't seem so overwhelming. Slow and steady wins the race. Good luck.