Learning/studying acupuncture online

You should definitely do like Dr Dupuis says. This is not to take lightly as in the end you would work with live beings. You want to learn as much as possible both in theory and practice. You can search the web for theory but to actually learn you need to find real practicioner. Here are some links that may be helpful to research the subject:

Acupuncture is a technique developed by the ancient Chinese in which very thin needles are inserted through the skin at specific points of the body to relieve pain, cure disease, or provide anesthesia for surgery. The technique is one element of traditional Chinese medicine, which also includes herbal remedies, massage therapy, and a healthful diet. Acupuncture is practiced in the United States by both medical doctors and licensed practitioners, although its use by physicians is mostly limited to pain relief.

According to Chinese belief, lines or channels of energy cover the body and flow through it. The presence of illness or disease indicates that the flow of energy is blocked. Inserting fine needles at precise points along the channels removes the blockage, restoring the free flow of energy and allowing the internal organs to correct imbalances in their functioning.