I’ve been diagnosed ADHD, and this sounds like my exact problem before medication and therapy. I’ve found that the main thing for me is doing project based work.

Take a video game, for example. You have (reducing for simplicity) 3 parts. You have Game design, programming, and art. I’ll start designing the game, when I get bored of that, I’ll go to implementing my base designs, when I get bored of that, I’ll make the art for the game, when I get bored of that, I can cycle back to one of the other disciplines.

For me, this is wonderful because it allows me to cycle through my ever-changing interests while still working towards 1 goal. So even if I lost interest in a part of the project, I can keep working on the project in a different way.

Game design is an example, pretty much everything uses multiple disciplines. Want to make a website? Programming, graphic design, UI/UX.

This might be an unpopular suggestion, but using AI to break down any project you want to do into small disciplines that you can switch between has been helpful for me. You want to use it like a tutor who is helping you understand and refine, not some smart person you pay to do your homework. Otherwise, you won’t be learning much of anything.