You can even just do the dry rock and your tank will cycle anyway. It just takes a bit longer. The necessary bacteria that your tank needs to do the cycle will find a way to get started. And taking it slow is a very good habit to develop right from the start. There is an old saying around here that goes, "Nothing good happens quickly in a marine aquarium!"
This can be a very confusing and even frustrating hobby as there are so many different routes to the same end point of a nice reef tank. So questions are always a good thing. Most of us here that try to help do so because we used to be just like you and now we want to try and make this easier for you to learn than it was for us.