In the Bible there is a saying, that if anyone wants to enter into the kingdom of God, he/she should transform like a child, same way, I would say, if you hand yourself unto god like a child, and trust him blindly, like by frankly spoken, honest attitudes, without hide your feelings, or without afraid of anything speaking truth, Your mind will definetly be smoother, and acquire concentration. This will surely lead you to success. You should never give up your task, whether it a easy one or not. Please keep on trying, Success is yours. Good Luck!