No matter how big your dream is, it can still be accomplished. It is normal to give excuses ones something seems bigger for you. Everyone who has made a great achievement in the world felt the same at the beginning but later on stood at good place and inspired others too not to give up.
God will not give you a task that you can easily accomplish but a difficult one. Do you know why? if it was so easy so you will never need His help in anyway. God always wants to be acknowledged and be given all the glory. He makes things difficult so that we may come to Him for His help. He is not a mean God, He just want to be part of our lives for without Him we can do nothing.
Everything starts with God and without his divine provisions we will be nothing but wanderers on earth.
Most times we take God out of the equation thinking with our abilities and talents we can make it anyway. It still rain into the sea despite the the amount of water it has.
Never rely on yourself but on God. Your human abilities cannot possibly carry you to the destination you want to reach and that's why God has to come in. Make Him the center of your life.
You can actually build any house you want to build but a good contractor will tell you that in every building the foundation is the most important part. Every house rely on its foundation to be able to stand. It is the foundation that holds the entire building and makes it unmovable.
We all depend on God just like a building depends on a foundation. Building your life around God is what make you stand and fulfill any great vision.