We are all made up out of energy particles and EVERYTHING around us, air water all is made up out of energy particles. If you CAN create a wave you can direct it towards distant areas and Beings.
A good book that does away with a lot of the wo-wo about very expensive atunements and so on and aids honest people on a shoe string budge is the ooold go-to book "Essential Reiki" by Diane Stein.
First read it, then follow the exercises, then find a Reiki practice group in your area, where other learners can practice on each other.
Reiki is just 1 of many healing with hands and energy modalities. Native Siberians use a comparable one but we have more energy wheel like centres called chakras in other cultures.. Same as many Native American traditional healers and hand tremblers.
Good luck and let us know, how you make out.