Some things to keep in mind.
Do things seasonally, but plan ahead of time as well as you can. Winter is for resting and planning your moves once spring comes. Be ready with seeds, trees, tools, materials and plans. Time goes by fast when you're having fun... or panicking. Don't stack
firewood in the middle of July. Don't wait til November to do the tune-up on the plow. Timing saves a lot of headache and sweat.
Keep a notebook with three kinds of paper. Blank paper for sketches or doodles, Lined paper for notes and observational data and Grid paper for doing more detailed planning and designing. A property map and a topographical map would help too. Make 50 copies of your maps and put them in the back of the notebook to draw plans on. Keep old drafts of things because in 3 years when you have an "AH HA" moment, you'll have a bunch of sketches to look at for reference.
I look back at mine once in a while and think of how those plans would have failed or what made them good but not great. Some of them were good ideas that just don't fit Yet.
Every project will take longer than you think and you'll change your mind a lot once you've started. Make a "dream list" of projects to complete each year. Expect to complete a few of those projects because issues will arise and you'll have "do-over's". Life happens and things get put off from time to time. That's ok, don't let it discourage you. I started digging a swale to divert water from my house to the pond last October. It should have taken a few days but bad weather and bad timing on my part made it take much longer. The ground froze before it was done and I had to wait til May this year to finish it.
Expect failures: Especially on "new" land, there will be things you simply don't understand about the terrain. Be sure to observe everything for a full year before making drastic changes if possible. You may not see a creek now, but one could pop up in a awkward place if you're not careful. Spring thaw and occasional heavy downpours of rain may surprise you with a pond in a place you don't want one. Usually the basement.
Start small-ish: It's better to have a small garden you can manage, than a huge one you can't. It will take time to learn your soil and make the needed changes. Until then, only take on a reasonable work load as you'll likely have to pay closer attention to things until they establish themselves and you establish yourself. If you attempt a huge garden, animals, canning, knitting and a
solar array in one year, you may pull it off, but likely you will struggle and something will suffer (usually you). I think this is where most people lose their enthusiasm for permaculture. Weeds, bugs, rain, heat-waves, chicken fights, sour milk... all easy to fix on their own, but no fun when it all happens in one week. Slow and steady wins the race. You'll get there, don't rush.
Smile: Despite all the trouble and headache, when the first year is over, you'll be able to look back and recount your accomplishments and failures. They are all valuable teaching tools. Learn what you can then plan for the next year.
If you're going to make investments in tools, BUY GOOD TOOLS! I bought a rake for ten bucks, used it for about 20 seconds, then hung it up. It sucked! Now I have a good rake that's a joy to work with. It was much more expensive... a whopping forty bucks. Incidentally, I cut the handle off of the crappy rake and replaced it with a tree branch I cut last year. Works much better now but still not great.
On tools: Don't buy anything that you can rent for cheaper. I wanted to buy a tiller when I first moved here 5 years ago. My wife convinced me to rent one first to see how it handled the terrain. I rented one from the
local hardware store for sixty dollars and used it for two days. I haven't had to till anything since. Good thing I didn't blow five hundred dollars to buy my own.
So I hope this doesn't come off and being a "downer". Permaculture IS GREAT and when you get going, it's hard to stop. I hope the things I mentioned above, help you to avoid some common first errors and make your transition to permaculture an enjoyable one.
Best of luck
Craig