"In his grace, God has given us different gifts for doing certain things well. So if God has given you the ability to prophesy, speak out with as much faith as God has given you." Romans 12:6
God has given you your gifts. You didn't choose them. Your gifts are essential to finding God's will for your life and you will find fulfillment in them.
If you are a new creature in Christ and are in communication with his Holy Spirit, you will begin to notice desires and ideas that point you to a dream. If you are trusting God, you can trust Him to point you to your destiny. Your heart's desires is what He uses to motivate you to doing what you were destined to do.
If you aren't sure what your dreams are...ask God and then listen. Be still and hear what He is calling you to. Your dream will only make sense when you have heard from Him and implemented his plan for you. Your dream is your own, designed just for you.
Stay with it - take courage when all seems for naught.