you're ears are really not that bad, but i would say lose the glasses if you can and the goatee or style it a different way. On the bottom pic with the jeans, they look a little tight..maybe a different style of jeans? Because you're skinny don't wear pants that are skinny but also not baggy. It just needs to be straight. I'd cut some of the plaid out, it's good but i think solids would maybe be a little better...i think the plaid makes you look a tad dorky. Besides those minor things, just relax. When you're nervous, people will notice it.
"Sometimes the best way to throw a punch is to take a step back"~Morgan freeman