As stated, you don't necessarily need a wand. It is simply a tool used to help you better focus your intent during spells and rituals.
However, if you feel you need one a poplar wand might be a good choice. It is a wood that is associated with masculinity, spirit, water, and fire. It is ruled by Venus. Poplar wands have diverse energy, thus, they are considered an all-purpose wood for wands. It is also useful for banishing, evocations, hope, rebirth, and divination.