What should I do to get rid of my gummy smile and crooked teeth? (photos)

My gums have shown since I was a child. They've made me really insecure especially recently with going to college. My teeth have always had gaps but I've never been able to afford braces until now (barely) but I want to do something about my smile. I also noticed my teeth aren't symmetrical with my nose and that slightly bothers me. My jaw "clicks" whenever I close it, it doesn't really hurt it's just annoying. It might be from when I got hit with a soccer ball a few years ago? What should I do?

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