If you do Zumba, do you go to a work out facility? They are excellent for the right equipment
. AND, they often have trainers and for a fee, they can get you started with what to do with the weights. I bet, though, even if you don't use a trainer, that someone that works there would walk you through a work out. If you don't have access to a Y or fitness center or gym of some sort, then a simple 4 pound weight is a good place to start. You can do exercises to music in your home.