"Oh no, I'm not a historian or anything like that"

Lee Hazlewood's quote indicates that he is not a professional in the field of history. He is most likely revealing his absence of knowledge in the topic, and is most likely trying to downplay his proficiency in the area. This could be because he is not confident in his ability to talk about the topic, or due to the fact that he does not wish to be viewed as an authority on the subject. It could likewise be because he does not wish to be seen as someone who is trying to teach others about history. Whatever the factor, it is clear that Lee Hazlewood does rule out himself to be a historian. He is likely more comfortable talking about other topics, such as music or literature. His quote is a reminder that everyone has their own areas of knowledge, and that it is very important to recognize and respect those limits.