How do I begin planting for guilds in a freshly-sheetmulched area?

We have four dwarf fruit trees that we planted last year. Yesterday we had a permablitz where we dug swales and sheetmulched the whole area to high heaven. I plan to plant yarrow and comfrey plugs by moving mulch, cutting a little area open, and planting into the soil. I'd also like to include perennial veggies (sea kale, miner's lettuce, rhubarb, cardoon, artichoke), borage, gogi berries (I have seeds), and groundnut or wild blue indigo to fix nitrogen. Is it too late to start by seed to establish perennials? Would I need already started plugs?

Some pics from the permablitz and the sheetmulched area here: https://www.facebook.com/kansaspermacultureinstitute/posts/1655664977976563

Looks like you folks did a nice job!
I make a lot of trees and other perennials in the fall. I think it’s better than spring because it gets so hot so early here.
Currently I have quite a few cuttings rooting in water. I’ll be taking root cuttings soon as well. Here’s what I have going on. Rosemary, lemon verbena, lemon balm, mojito mint, figs, pears, pineapple sage, lavender, rose of sharon and strawberries. Did you know that strawberry runners can be rooted in water then potted up? I’ll start making elderberries by root division soon.
I haven’t started seed yet though. I’m always afraid they’ll get leggy before it cools enough to plant them.
I feel like fall is the perfect time to plant perennials. The weather starts evening out and the plants can put down roots without struggle.
I noticed you haven’t been here long so WELCOME TO PERMIES! We’re glad you’re here!

You may want to look up what you can plant this time of year in your area.  I could tell you lots of perennials and even annuals that I can plan now through October where I live, but if you do the same it could all die.
I had great success planting in a newly mulched area last year.  I didn't cover the ground with anything ( I wish I had because now it's weed city). So you will probably want to cut a little hole in that.  I pulled the wood chips back creating a cone shape I loosened the soil at the bottom, then I filled it with organic compost and planted, seeds and plants.  I did mine in late spring last year and had the best crop of melons I have ever had.
Good luck to you. Happy planting.