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ADHD (and many other psychological struggles) can be managed with practice and good habits and time. You seem to have a desire to change (evidenced by posting here) which is a great signal you are in a place to make changes in life. If you want, you can learn now how to make changes in your life to work with your ADHD and learn to manage it's effects, thereby being more successful than you would have been leaving it undiagnosed and poorly understood. This is a great position to be in! You know are in a position to learn the skills you need to manage the ADHD.

Additionally, you seem to have diagnosed yourself as having a skill deficit with interviewing. This is also a great position to be in. If you want to work on interviewing, which based on your message it sounds like is your weak skill, then invest time (and maybe money) in practicing that skill with the added understanding you have (and skills you are building) about your managing your ADHD.

One way to think about this is to treat interviewing as a separate skill set; there really are lots of online resources that teach you to interview these days. Practice interviewing as a separate skill set.

You can invest in this skill with money; leetcode and other sites really package this as a service. The benefit to you is not that they will grant you a job offer; it's that they will grant you the opportunity to practice in low stakes environments. There are also places online that are pairing people for interview practice.

You can also reach out to people you have worked with previously and say: I want to practice interviewing; would you spend 30 minutes with me doing a mock interview? People love to help each other.

At the same time continue to invest in managing and understanding your ADHD by working with professionals to develop those skills. Combine the two and some time and you can do this.

You'll get this. Hang in there! Feel free to email me if you would like to talk more.