In my estimation, there are two ways to be really good at something, learning about a subject in a formalized setting or just going out and doing it.
The latter trumps the former in most situations. The issue is that any shmuck off the street can’t necessarily just jump in and do a lot of things. Surgically operating on a human being, psychological advice, flying a plane, using a chainsaw to cut down a forest, etc, all fall into this category. The last one is debatable, but you get the point.
Certain practices and subject matters are reserved for experts. They have to be, for the good of society. They take time, sometimes years and in special instances, decades, to perform at a professional level.
Other things, on that hand, are actually better suited for doers, people that would rather experiment and work at it on the fly. Riding a bike, planting a garden, writing a resume, creating a lemonade stand or writing a book are all these kinds of things. The same goes for starting a business, I think. It’s better to just dive right in and work around the rough edges as they come. Many activities people aspire to often remain aspirations for fear of incompetence initially. Writing a blog is a good example. It really isn’t all that difficult if you commit to it. There are SOOOOO many things people can learn on their own, without a formalized classroom setting or guidance, if they just go for it.
“When you are asked if you can do a job, tell ’em, ‘Certainly I can!’ Then get busy and find out how to do it.“ — Teddy Rosevelt
Words of wisdom from a guy that gave us national parks, carried a pistol with him in the white house, knew karate and had a sweet mustache. Gangsterized.
Regardless of what you want to do, there is a big distinction between kinds of tasks. As such, it’s important for you to understand what you want to do and where that thing(s) fall in the knowledge spectrum. I like the things I can just jump into more so than the formalized. But the formalized are more typical of vocational exercise.
Anyway, figure out what you want to do. Then figure out where it falls. Then get smart.