Welcome to the club!
I reccommend starting with this, Ultimate Psychic Senses Guide / Ultimate Astral Senses Guide / Ultimate Spiritual Senses Guide
Then ask your guardians to contact you and look for signs. They will give you symbolic signs and guide you for about a year or so to test if youre ready. As you piece together their messages, they will teach you more. Eventually they will reveal who they are and shit tends to take off from here, i think the first phase is them testing you but it could just be because we have to furhter our knowledge and senses.
After you figure out who your guardian is, thr first entity sent to teach you(initiate you) thats when id start doing evocations and such.
This is from my experience as if you jump straight in your christian dogma will manifest bad experiences.
Hope this helps you find direction in where to begin