Individualism is that the way somebody uses there own life and own experience to see the world. I believe this because if you ask somebody what you see, your idea of what you see may be different than what the other person sees. It makes you a better person because it lets you shape your own adventure and how you see the world.
Idealism is the idea of pursuing ideas of your own interest. I believe this because it is unlocked with you natural rights. The pursuit of happiness. If you can, follow your dreams no matter how unrealistic they are. It makes you a better person because instead of following a crowd, you can go follow your dreams and do what you want to do.