Do you have any idea what you want to study? Or where you want to go? Your best bet would probably be to do a year at community college and prove that you are capable of college level work, also make sure if you are in the states that you take the SAT's you will be entitled to extra time and some help BY LAW if you take them.
If you are in Canada let me know as I can tell you where to apply (if you narrow down the province) and what would work best for you.
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