u/Dear-Skill-5422

I have been very curious for a while about Elemental Affinities. When Naruto was training to make his own jutsu through wind manipulation training. We saw Naruto go through step 1 and step 2 of elemental training. What are the other training methods for the other elements? Are there any more levels? Is there a training step to gain mastery over an element? Is there anything for sub elements like Wood? I have been so curious and wondered what your thoughts are or if there is a fanfiction that shows these steps or mentions what they are?