Before understanding and being able to perform kata correctly, you must know basics.
Many students like to try to rush past basics to try to learn kata.
If your basic technique is poor, it will make every kata you use that technique in look poor. You can not perform even one kata correctly if you do not perform the basic movements correctly. I have known many students who believe that if they make it through a kata without stumbling or falling down, then they know the kata and are ready to learn new katas. This is a very wrong belief. Young students especially try to rush past the Fukugata katas thinking them too simple because they are not as flashy as the Pinan katas.