Anybody can become a Chakra Healer, however, a good question to ask yourself is why do you wish to do so?
There, are hundreds of energy healing modalities available today. The most popular are Reiki, Theta, Pranic Healing, Violet Flame, Magnified Healing and many more (link to the list is given below).
Almost all, that work with the Universal Energy healing will include healing of the Chakras, as the Chakras are the energy centers and healing them would be healing the person.
Explore, what is around you and learn two or three modalities before you decide which one you relate to the most.
“In the end, it is all a question of Balance”