I did a PDC (Permaculture Design Certificate) through Oregon State University a number of years ago. It was great! I also did a bit of a local one, but I found the Oregon won to be way more professional. Andrew Millison was one of the instructors, and he was great. I was living in Tampa at the time, and we did a bunch of stuff in our yard, but we moved to Nova Scotia last year so I'm kind of back to square one in terms of my plant knowledge. Fortunately, we already have some good stuff established here (raspberries, blueberries, rhubarb, asparagus), and we'll just add to it as we learn.
For anyone living in warmish climate, katuk is my absolute favorite plant. It's a great edible green that can be cooked or eaten raw, it tastes good and it is dead easy to grow, propagate and harvest.
My newest experiment is a fig tree. Apparently, folks here (again, Nova Scotia) will leave them outside in warm weather, wait for a freeze when they'll drop their leaves and go dormant, water them and stick them in an unheated shed. Then put them back outside once it gets above freezing again. I certainly didn't expect to grow figs here but I'm giving it a shot. :)