There’s a famous poem whose author is unknown, entitled “Don’t Quit.” The ending lines are:
“Success is failure turned inside out.
The silver tint in the clouds of doubt,
And you never can tell how close you are,
It might be near when it seems afar;
So stick to the fight when you're hardest hit -
It's when things seem worst that you must not quit.”
Know that you’re not alone. We ALL go through times in life that are full of self-doubt. Each and every one of us has felt like quitting at one time or another. But if you put your mind and heart into it, you can achieve anything. So go for it. And good luck!