I suppose it can help.
I definitely know the feeling of enjoying far too many things and being unable to choose just one or two to focus on. I eventually went back to my childhood and chose to focus on the things that I loved to do when I was little: writing and reading; music; animals. These don’t really combine into a single profession, but they give me a little more of a direction for my time than I had.
Lots of people struggle with this kind of thing, not just ADHDers. If you’re trying to figure out what kind of career to pursue, I recommend the book What Color is Your Parachute, by Dick Bolle. I’ve read it a few times (your local public library should have the most recent edition available) and find the chapter with the exercises (something about a flower picture) the most useful, since it takes you through determining your skills and interests and figuring out where they intersect.