Sis, zumba, just like any other aero exercise, umuulit lang ang steps. Yan din ang takot ko noon, baka mabuhol buhol ang paa ko pero since umuulit nga ang steps, you'd get it especially if you regularly attend class. If you want to learn the basic steps (like samba, salsa, merengue) you can look for this video: Zumba Fitness - basics & 20 minutes express. Ipapakita how to do the basic steps one by one tapos my 20 min exercise. I learned a lot from this vid.
Edited to add: ipapakita how to do the basic steps "correctly"