Kades, I learned to make a ganache last spring, forget the details now, but it was melt chocolate and heavy cream in a double boiler. Also did something in a double boiler for the cake part. It was easy and I didn't screw up either the cake or frosting. I think it may have been melt the chocolate and fold in whipped cream in cooled choc for the frosting?
Needless to say, up to that point, the Top of my 20 year old double boiler was practically brand new. Chocolate sauce here we come. No more hershey's in the can.