Qēn is a subset of Kqān, the meaning of it very subtle and difficult to describe in English so I’ll have to show it’s meaning after I start illustrating how to construct words and sentences.
The pronunciation is that of a “hard” k, and usually in roman letters, it will be a “q” and not a “k” except if it’s a name in the writing which will, as usually, be somewhat dumbed down for use in the text and not confusing people, because most English speakers who see a q without a u get confused and don’t know how to pronounce it. Usually it’s only said with a “hard k”. The Kheta letter is usually said with an aspirant, so it’s considered a “soft k”.
So, without diacritic marks this letter is pronounced “ka” when reading it.