Make a Christmas Wreath
The internet is great for projects like this. You can find inspiration and expert advice on how to do it, buy supplies online and if you're feeling super confident, share your work on social media.
Expert advice & Inspiration
These step-by-step guides tell how how to make your wreath and find foliage.
You can find anything you need by searching for that specific item online, or by looking for "florist supplies". Some big online sites have wreath making sections. Here's Amazon's and Hobbycraft's - both stock everything you could need.
If you don't have access to foliage, or you want something super-special, you can always buy a kit. Search online. Or try somewhere like crafty Etsy or specific florists like The Floral Connection or Flowers of Bath. These are premium kits and expensive though, so it's much cheaper if you find what you need yourself!