You can make a healing wand out of anything; you can even use your hands to heal and skip the wand altogether.
The most popular form of healing wand is a crystal wand, or a wand with a crystal point (usually clear quartz or rose quartz). If you want a solid crystal wand you should just buy one, cleanse it, and charge it.
Otherwise here are some simple directions: buy a wooden dowel from the hardware store (or use a branch!) and attach a quartz crystal to the tip using some copper wiring. Decorate the wand with words, colors, or symbols that help you to activate your healing magic.
I applaud you for your interest in white magic.I think it's better to spend your time in white magic then black because white magic helps people but black magic harms people also it can back far and god knows what will happen