Finding someone patient, willing to teach you to communicate is hard, as many of them won’t even think of wasting their time on such a complicated operation. Truly opening one’s senses to the point they can communicate efficiently is a long and tedious procedure, often requiring a powerful gift.
However, these are some powerful entities known to do such things:
Naamah, Tiamat, Abaddon, Azerate, Paimon, Leviathan, Lepaca and Sameal.
I have talked to Abaddon, Azerate, Lepaca and Paimon.
Abaddon (AKA Apollo) is a very wise old man, an Advisor, he is polite and generally speaking willing to help. . He is also one of the four demonic gatekeepers, alongside Amaymon, Azazel, and Belial.
Lepaca is the demon of Openings and Disclosure. Modern practitioners of the Draconian Tradition, such as the Temple of the Ascending Flame and the Temple of Layil, often call upon Lepaca for the facillitation of invocations, evocations, and the creation of sacred space. He can also be called to facilitate the opening of Chakra points.
Paimon wasn’t really too eager to help me out since we have some conflicts of interests that better remain undisclosed, but he is very powerful and if he gets to like you, your life will be drastically changed.
Azerate (AKA Chavajoth, but don’t use this name, he doesn’t like it) is the shit. He is the most powerful entity I’ve ever worked with. In the book Liber Azerate by the ToBL (formerly MLO) Azerate is the hidden name of the “eleven anti-cosmic gods”, he is described as such because people can not comprehend his power (his words, not mine). He is, however, messy and scattered, but get his attention and you will unlock all that you desire.