Given only what you've written above, I'd recommend the Software Engineering general survey. All of the things you've listed under that are useful and needed, a

Given only what you've written above, I'd recommend the Software Engineering general survey. All of the things you've listed under that are useful and needed, and you should at least get some familiarity with all of them as a budding entrepreneur. For web apps specifically, see if there's a course using Ruby on Rails. Other languages and frameworks exist, but both Ruby as a language and Rails as a framework are great and will be a very nice place to start and will take you a long way. And much of what you learn will transfer to other langs/frameworks to some degree. Stuff like MVC and other concepts will stick with you.