Ninjutsu is the base of all techniques that need chakra. Not everyone is capable of learning ninjutsu since not many people have access to their chakra network, unless they are a shinobi and have had training to do this. To perform ninjutsu there is one 'thing' that is required, chakra. They use chakra, sometimes in combos with handseals, to create all different types of techniques. The handseals mold the way the chakra must travel to create the specific ninjutsu. A more skilled ninja is able to change their chakra that allows them to use elemental ninjutsu. This means the ninja is capable of using things such as: Fire, Lightning, Water, Wind and Earth. To perform jutsu, 2 methods must be used nearly all of the time, these are Shape transformation, and as stated before, Nature transformation.
(I typed this up earlier, I knew what the question was)
Is this good enough for my first go, Crow-sensei?