Seems to be like “Eh-dew”, “Eh-dee”, “Eh-dich”, so eh- or uh- for the Y at the start. Welsh IPA guide on wiktionary says Y at the start is like the a at the start of “about”, when it’s not either a single-syllable or in the last syllable of a word, in which case it’s an “eee” sound, like the end of “happy”.
I’m not OP, but I also prefer KDE over Cinnamon. The size/spacing of the buttons on the left side of the start menu/application launcher looks weird to me, and while I’m sure there’s merits to Cinnamon that was enough to sour my tastes.