To read hieroglyphic writings one doesn't need any higher education than to read any other writing. Of course, there are some principles and rules to master, but they are simple rules. Literacy started when resourceful men, their inherited capability to recognise an object by the similarity to its drawing, combined this with similarly sounding words to the name of that object. For example, by the drawing of a palm we write down the similar sounding plum word (similar here stands for 'has the same consonantal frame').
The essence of hieroglyphic writing is in the rebus principle by which an easily recognisable object's name stands for a similarly sounding but hard to draw word.
The Cretan hieroglyphic writing is an organic writing system. The texts are compiled in such manner, that by naming loudly the picture elements in row, everybody could understand its message. This is a strictly consonantal writing taken down by small recognisable pictures, called hieroglyphs. The vowels can be changed to the need of developing the train of thought contained in the consonantal frames.
From the above said follows that any hieroglyphic writing can be read only in its original language, which has to be a linear one, in which always the last word or suffix determines the role of all previous words in the sentence. Magyar is such a language, probably the only one, so ...