I used to buy pre-made wreaths and "doctor them up" with my own goodies (that's what my Granny used to call it when you add stuff to a hamburger or other sandwich).
At the end of the season I'd always strip the compostable stuff off the base, and save the ring and even the wires for making my own wreaths in the future. I'd seen enough tutorials on craft and gardening shows and magazines to know that making my own was quite doable, but it always seemed like I was too busy with other things by the time I wanted one up, and store-bought wreaths weren't that expensive...
Then it seems like store-bought wreaths suddenly got super-expensive. And a lot uglier. So a few years ago I finally started making my own - and now I feel dumb that it took me so long to get around to it.
What I thought would be a time-consuming project that might look weird turned out to be an almost foolproof thing I can throw together in minutes. It's handy that I still have so many old wire or plastic wreath-forms saved from years of storebought ones, but pretty much anything you find that's a circle (a hub-cap ring, machine part, picture frame, really if it's a lightweight-ish ringy-thing that can be covered up with greenery, you're golden.
If I've got a floppy or hangy area: wrap another chunk of wire around it. Skinny/naked area: wire another glob of greenery to it. Just like that. After it's been up a while, something starts to sag? Tuck it in, wrap more wire - really, you get the picture here. It's not rocket science.
It also feels more meaningful when I hang something on the front door that came from my own back yard. I find lots of unexpected things in the garden to add: stuff I usually overlook (weeds, pods, vines, twiggy and mossy branches that litter the ground after a storm) and when my yard's garbage makes something look pretty, I don't feel so bad for having not cleaned it up in the first place.
Really, you should make a wreath (or 2, or 3...). It's totally satisfying!