My hobbies used to be collecting hobbies. CBT helped me realize that, and now I know when to pull back before I jump 10000% into a flavor of the month. I still get interested in things, but I give myself a 72-hour cooldown before purchasing anything new for a hobby. If I'm still interested after that, I dip my toes in. I more often than not realize it's just a fixation and save myself a ton of time and money that I can put towards my long-term goals.

If you feel you might have adhd you would want to start with getting a diagnosis. Usually, through a psychiatrist. From there, they can work on a treatment plan.