Help needed for child with mild ADHD

I want to figure out how I can support him better until he finds a good therapist.

Right now, he isn't ready to accept help from others. So, I need to do what works best for us.

To be more effective, I want to learn more about ADHD and the strategies that have helped others manage it.

My child struggles with focus and memory issues. He also has perfectionist tendencies and sets high standards for himself. As a result, he gets discouraged if he makes mistakes repeatedly or can't solve problems easily and tends to give up quickly on subjects then.

In contrast, learning languages comes naturally because the questions are straightforward.However, when faced with application-based questions, he often becomes confused and loses confidence.