Hello all. I am fairly new at chess but I love it to death. I was particularly interested in drowning my opponent with sacrifices into their castled position. something like this:

 are there any key squares that need to be unguarded for such strong sacrifices/tactical movements to take place? Please let me know. thank you.

I think that you're are attacking too early (I'm not an expert, so take this with a  grain of salt) You need to try to bring as many of your pieces as possible in the fight, so it would be wise to develop your dark squared bishop.

Also, taking the free night on d5 would help too ;)

In the standard kingside castled position, the Nf6 is a good piece to get rid of, as it helps defend the h7 square and protects the g7 square