Welcome. What is it that you think might need changing and why?
Learning generally boils down to "Repetition or the avoidance of pain", some people learn by doing, some by watching and some just have to pee on the electric fence.
Whether you think that you can, or that you can't, you are usually right. Henry Ford
Welcome, you may not need to insulate your smoker. Explain exactly what you have and what you want it to do. Many guys here are very good at this stuff