Approach each task one by one. Remain calm, avoid being hasty, and take your time. Everything will be accomplished. You should have faith in your ability to achieve this.
Additionally, do not overly pursue perfection. No one is perfect, and it is quite normal to make occasional mistakes. There is no need to rush to obtain a perfect answer.
As you can see, although some time has been spent, each task has been completed. Therefore, do not be hasty or anxious. Take your time, and you will surely reap rewards.