The fastest way is to basically by establishing and mastering neccesary basics in order for them to funcion propery:
-That includes clean and powerfull enough soul and chakras that includes main 7 ones, not only clairaudience and clairvoyance points in order to even awaken/activate them and have enough fuel to use them.
-Enough mental strength to have enough control over them, otherwise you would go full bananas, and we don't want that obviously, this is achieved by void meditation.
-And obviously like every other skill you need to practice in order to gain experience and mastery.
-Spiritual advancement requires time and patience. Challenge your limits, but don't push too hard to avoid burning out , and don't go too slowly; otherwise, there will be no real progress. Maintain a balanced approach.
-You can also additionally perform a ritual for Lord Agares for guidance and help, but please do it in a very respectful way.
There are no magical cheat code shortcuts to avoid these steps.
Good luck.