How do you know if it’s ADHD or just something you have to change about yourself?

I’m out of a relationship and I have to start from scratch again. So I decided to list everything wrong about me since I’m so Lost and change it.

The ADHD part is covered by therapy, treatments etc..And I know I have stuffs to change about myself.

But I struggle to know if it’s due to my ADHD or if it’s something else I have to change.

Do you have ideas on how to identify ?