Giving up is not something that you should ever consider, because if you give up then you will never achieve your goals or reach your true potential. The human spirit can persevere against even the biggest odds, as long as you keep plodding on and never give up your hopes and dreams. Those who give up seek the coward's way out, and they will never fulfill their ambitions as a result.
Fear is our worst enemy and it stops us from achieving our goals and dreams. Fear of failure, fear of loosing it all, fear of loosing the people that you love, fear of being laughed at, fear of even success. God wants you to achieve your dreams, He planted them in you, and so He wants you to get there. But in order to do so, you need to conquer your fears, not one or two but all of them. Only with God you can conquer your fear, He will help you if you ask Him, and when you conquer them, you will set yourself free.