Irieren, let's pray with you, but first correct your thinking. Remember, God is glorified in our diligence and effort, not just in our requests. Studying is important as it is our responsibility. In 2 Timothy 2:15 WEB, we are told to "be diligent to present yourself approved by God, a workman who doesn't need to be ashamed, properly handling the Word of Truth." This principle applies to all areas of life, including our studies. We are to work heartily as for the Lord. Let's make this subject and your studies an offering to the Lord, so they will not be rancid, but pleasing to the Lord. We need to be thankful in all circumstances.
Also, you forgot the most important thing. It is only in the name of Jesus that we can come boldly before God. You did not mention Jesus or even hint at Him. In John 14:6 WEB, Jesus said, "I am the way, the truth, and the life. No one comes to the Father except through me." So let's pray correctly. Let's add your need to pass your course with a 6. Without Jesus, we can do nothing, so we need to pray in Jesus' name. Let's pray
"Father, we come before you in Jesus' mighty name. We ask for grace and for Irieren to diligently study economics. Please help them to pass with a 6 as they need. Help Irieren to give thanks in all things, even in studying economics. Jesus, cover Irieren's mind and help them to remember what they've studied and to apply it well. Please guide Irieren's instructors to be fair and wise. In Jesus' mighty name, we pray. Amen."
Let's encourage you with Colossians 3:23 WEB, "Whatever you do, work heartily, as for the Lord, and not for men."