Help Understanding a Pin Puzzle

For black

Because After Kf2 , if you take his Queen with the knight , he's gonna take Ur Queen with his rook , and u would find urself in a position where Ur knight is hanging and his rook is active , but when u take his rook first with check , then After k*e1 , u Can take his Queen for free and u would find urself UP a whole rook

I am confused in this puzzle that had me play as white, when the Qxh4 I found a fork with Ng6 which forks the queen and the rook and I was confused at why it was incorrect when i thought i would simply win a piece, can you explain to me why Ng6 is incorrect?

because if u play Ng6 right away , black can take ur queen with the rook with check( which is the problem because when iin check u're forced to react to R*f3+ so there's no time to capture his queen) and after u take back with either bishop or king , he can escape with his queen , and ur queen is lost that way , so what we need to do is to take his rook with check then fork him on g6 with check and take the queen ,

Ooohhh makes sense