The key to good waffles and American-style pancakes is buttermilk - hence using Bisquick as the dry base. If you have a 'scratch' recipe that calls for buttermilk, you are likely to be on a winner.
I've bought buttermilk in Morrisons, but last time I was in the US I brought back powdered buttermilk, specifically for pancakes, waffles, etc.
My waffle iron is a cast aluminum stove-top version that I bought on Amazon before moving back here. You just need to be careful about the heat, but like most things, once you get the knack, it's fairly easy.