Don't waste time doubting your own abilities.
The most difficult thing in life is to get started; to act upon your desires. After that, it's your tenacity and persistence that will carry you forward. Passion and drive wax and wane; they fade in and fade out. But tenacity, stubbornness and persistence can carry you through those times when your passion dips. If it's something that you truly want, unleash your persistence and tenacity.
Soft skills, such as getting along well with others and working cooperatively, are essential, not optional.