<p>reading and doing chemistry problems are completely different things. Just by reading it, of course you think you will understanding, because the solutions are in front of you. When you taking a test, or doing hw, its not that easy. Usually teachers/instructors will give you problems to solve that are within the same concepts as their lectures, but entirely different problems, and can be challenging. ALso you seem to be under assumption you will be a “bigshot” Doctor, by the time you graduate from college, and go on to become a Phd holder. Since you are this young, you have alot of time to decide what is best for you in the future, you may change interest all together in another field </p>