>>2 This.
ATE, get it together. You can't accomplish anything if you don't try new things. Make an impression on the world, on some people. Make certain that someone will remember you when you're gone by creating something, preserving something, accomplishing something.
Whether you have confidence in yourself or not, you're not gonna build any if you lie there moping. Get up, and find something you're good at. Something you think is fun. Take that, and master it. Become the best you can, and make people remember what you've done.