This is kind of a difficult question, you have to consider many things to determine whether it is easy or hard to learn to play the drums. There are several things that are required to be able to play the drum well. Good eye-hand coordination is extremely important when it comes to learning to play the drums.
A very important part of learning to play the drums is to find a good teacher. You will also need to be able to set aside plenty of time in order for you to be able to practice. Like with any musical instrument, you need to be able to put in as much practice time to learn what the person who is teaching.