Python is a great language to get started.<p>In my opinion, at that stage you should definitely concentrate on smaller texts, do all the exercises and additionally write a lot of small but complete programs.<p>As soon as you start writing programs that take more than a couple of hours to write, you should start using a source control system.<p>You should also read some high-quality source code, especially small utilities and small web applications. This will help you learn not only to write idiomatic code but also how to organize the code, how to write makefiles, how to write documentation, etc.<p>To be a really solid programmer it's not enough to know a programming language well. You must also learn about object-oriented design, databases, memory management, computer architecture, algorithms, security and other topics. It's a long road, and (again, in my opinion) it's not necessarily a road you want to follow if your main goal is to be an entrepreneur.<p>Have fun.