Being one means that we will spend a period of time feeling uncertainty. Seeing one means that you impose yourself easily.
Dream dictionary: Illiterate dream meanings
…or stand in the way of completing his project. Writing with the left hand in a dream means indulging in loathsome actions, going astray, or perhaps having a son who is born from adultery, or it could mean that one may become a poet. Signing a deed, a check or a legal contract in a dream means failing to fulfill an agreement. If one sees someone he knows drafting a contract between them in a dream, it means that the other person will defraud him, mislead him in a business deal and drive him astray. If one finds himself illiterate and incapable of writing in a dream, it means that he is depressed, though God Almighty will show him a way out of his difficulties. If an illiterate person sees himself trying to learn how to write and read in a dream, it means that he will benefit from something…
Dreaming you learn letters, is good to the illiterate, and those who can read it foretells evil.