How can I fix an overbite and severe spacing between teeth, preferably without traditional metal braces? (Photo)

I'm a junior in high school and I've never had braces but last year I did get two small composite veneers in the front of my mouth to fix large gaps I had. however I still have an awful over bite with sever spacing in the back and generally not a pleasant looking smile at all. what can I do to fix this ASAP? would lingual braces or Invisalign work? also, could porcelin veneers or crowns and caps in the back of my mouth fix this and give it a more attractive look? all help is greatly appreciated!