I’m surprised that nobody has mentioned possibly seeking help from a doctor. Prevalence of ADHD in the adult population is estimated to be much higher than the rate at which it is diagnosed.
If you have the inattentive subtype of ADHD, medication is 90% effective at alleviating symptoms such as procrastination.
Many people here have commented about doing a “dopamine detox,” but what if your brain isn’t producing enough dopamine on its own? A detox is unlikely to help.