When you were young you probably felt you could do anything, you had no limitations.
Limitations are a learned or acquired facet you need to unlearn pretty quickly.
Those limitations only exist in your mind.
There is nothing stopping you from succeeding except those self-imposed limitations.
Ditch them! You didn't arrive here on earth with limitations, you acquired them. Send them back to where they came from.
Start to imagine all the possibilities that are open to you. Expand your horizons, look at the bigger picture and drink it into your being.
Become your dreams, stretch yourself and know in yourself that you can and will succeed.