The reading for this word is the kun'yomi reading, since it's like putting two single kanji together rather than a true jukugo word. To learn the kun'yomi reading, take a look at this mnemonic:
From the middle of the middle comes a sound. It is a knocking sound. Knock. Knock. Knock. You open up the walls around this thing. Then you open up the second set of walls (middle of the middle). Inside is an old man, who identifies himself as "the knocker." You go inside of him and find another knocker as well. That's why it's a knocker knocker (なかなか).
I really can’t do it.
That prince is quite good, huh?
It’s not very easy to make oneself a master of Mario Kart.