Hey friend! I can see auras since I'm really little but I too only saw colors sometimes. Try practicing on your hand or your head in a mirror. It usually works better if you place your hand infront of a black background. Also try get a friend that you can practice on. If you can, always try look at peoples heads, a few inches away from the head, if you start seeing the white color try blur yours eyes. Try tune into their energies, and maybe write down your experiences.
Blessed Be Beautiful! ~ Ol