Is there a way to completely RANDOMLY select my flashcards (25, 75, 100, etc.) to test on?

I imagine I could view my vocabulary words according to “creation date”, “importance”, etc., but I often just go through the vocabulary alphabetically.

But is there a way to completely randomly select a number of them regardless of any of the available parameters?

Not now, but it is something we could think about for the future. For now you could select a hundred items according to any of the existing parameters and then shuffle them in the flash cards.

the only possibility is, if you choose in the way you discribed and then you need “shuffle” in the flashcards.