"I've always been that way. I'm not very good at reading music but I'm pretty quick at picking things up"

Roy Wood is referring to his ability to discover and pick up new abilities rapidly. He is saying that he is not great at reading music, but he has the ability to get new abilities rapidly. This suggests that he is a fast learner and is able to adapt to new circumstances quickly. This could be a result of his natural talent or it could be an outcome of his commitment and hard work. It is most likely that he has actually developed this skill in time and has become accustomed to finding out brand-new things quickly. This quote is a testament to his ability to find out and adjust quickly, which is an important ability to have.