How much daily practice for psychic abilities

When I was a child I was able to see visions very clearly, my mind was very calm and silent and my aura was very colorful, there’s no doubt children have remarkable energies…

My clairvoyance isn’t at its best, however I’m trying to get it to its full efficiency, it usually activates when I meditate with my spine completely erected, but I would like to find other effective ways of developing these senses

Does anyone know how long a person should practice daily for real results?