Find your weakness and you will solve your problems. Identify your weakness then practice to improve it; once it improves, it will no longer be weak but it will become a strength. Apply this practice to all things. Once you have identify and practice correction you will see a good change; not easy to achieve but very effective. All the darkness in the world cannot extinguish the light of one candle.
That light overcomes fear, fear is the most common of our weaknesses. Fear to many things but usually fear of change. Remember the Lord Jesus Christ when your fear comes out. He never changes. Faith in the Lord Jesus Christ will conquer that fear, that weakness. Practice with faith in what you do and you will overcome that fear of failure; believe in what you do, train with confidence; stand strong! strong in what you do, strong in what you believe, strong in who you are, strong in your practice. Complaining and excuses work against faith and believe in your training and your learning.
Look for a lesson in everything. Patience and discipline are required. Discipline teaches us to practice by a certain standard; set your standard of practice. Respect authority. Equal importance to everything, every detail. Respect to each move, not one is more important than the other. The smallest detail cannot be less important than the largest. The first kata is no less important the highest kata you know.
Keep everything in balance.