I posted this in another thread here, as well, but since it may also help you, I will place it here too.
To add to what was said previously, you can make your wand out of whatever you like. Some use certain woods, metals or crystals that are associated with what the wand will be used for.
For example, I use a wand made of Sycamore. The sycamore is commonly associated with harmony, raising energy levels, prosperity, love, and success. I use it when calling to the spirits for prosperity rituals, bringing harmony, etc. I also have a selenite wand that I use when doing crystal healing and reiki.
I've a friend that actually uses herb bundles in place of an actual wand. She has claimed great success with them as well.
As for adding decorations, you could use small wires to attach gems, feathers, etc. If you have a soldering iron, you could even carve runes or other magical symbols into the material used for your wand.
The material used is really up to you. You can be as creative as you like. Though, using a wand is really up to the practitioner. You don't need one, but if you feel one would be beneficial to you, by all means make one!
I added a few links below for the magical properties of wood, should you decide to use it as the crafting base of your wand. Just remove any spaces that appear when you copy/paste it into your browser bar and they should work just fine.