Sometimes trying new things is good when you are playing an unrated game against someone harder than you.  Sacrificing can give you a slight advantage or clear win in a game of chess.  Lets say you do the Queen's Indian.  Feandchedoing your queens Bishop (and attack to the black king side) can give you a sacrifice on the kings castle.  You may want to Rook Lift too.  Remember sacrificing and trying new things may not be THAT bad.

That is  very cool!

thx