**Don't be a good student and a bad teacher.**
I strongly agree that all you need is the courage.
Aside that all you need is the believe.
Being optimistic as well help in pushing you to do great things.
But you ommited one thing.
Which is very vital in achieving success.
The exact thing you omitted is a plan.
We only plan to fail when we fail to plan.
Whatever activities you want to do.
Make sure there's a plan on how to go about it.