You mean “dropped out” or “finish”? The first means you didn’t get a degree before leaving.
It can be difficult to really study after you’ve left a place of learning. You may get lucky enough to get a job which includes a self-improvement aspect, but more likely is you’ll end up sacrificing your own time.
Robert C. Martin believes the latter is what professionals have to do (read some of his books or watch some lectures if you’re thinking of getting into programming).
Malcolm Gladwell’s widely criticised and overly simplistic 10,000 hour woo does have a kernel of truth to it though, do not expect to become good at something overnight, great at something in less than a couple of years and done with something ever.
If I could give two pieces of advice to my younger self, it would be “read more theory, not just how-to tutorials” and “at all times be aware of correctness”. It’s no good writing code that does … something, it has to do something right. And that means you have to think about how to test the outcome of your code before you start writing it.