Every person alive is here because of thousands of ancestors who were smart enough, strong enough, and social enough to survive far worse conditions than what most of us are faced with today. Regardless of your race, ethnicity, gender; or your physical or mental challenges; you have it within you to survive and thrive. While it is helpful to know and try to shore up your weaknesses, it is more important to discover and capitalize on your strengths.
The best way to do that is to task risks, try new things, and to push yourself outside your comfort zone. Don't merely accept other people's expectations of you, or your own assumed limitations--test them. When you do, you'll often prove others and yourself wrong, surprising them and yourself as you exceed those expectations.
And when you don't, because sometimes you won't, try something else. A dead end is just an opportunity to go down another path.