Hi Sar, there are so, so many ways to create wreaths. They can be made out of cardboard boxes by cutting out a large circle then a small circle within it and decorating with pine cones or you may also use a wire hanger, purchased grapevine wreath,wire, styrofoam etc. forms available at any DollarTree or craft store and decorate to your liking.
Dollar stores have wire frames & foam frames, both.
They have all kinds of ribbons, greenery, green wire, hot melt glue, etc.
Work on “balance” not “symmetry”, as our eyes notice any flaw in symmetry.
If you fancy something a bit different we've made a star wreath this year
Here's a whole bunch of ideas!: https://www.frugalfamilytimes.com/2019/11/dollar-store-christmas-wreath-ideas.html
I love my friend's wreaths :) https://gardentherapy.ca/making-fresh-wreaths/