The dedication comes in because as a filmmaker, you will have to forge our own path. Having worked with literally hundreds if not thousands of people in the industry over my career, I can say that there is no one guaranteed path to joining and staying in the industry. Don't expect to become rich or even have steady employment. Many people working on films do so project-to-project, working long and irregular hours. If these types of factors don't deter you, then you just might have the dedication you need to be a filmmaker.
Because there are no guarantees of employment, that's where the luck comes in. There are ways to increase your chances by taking classes, volunteering, and being in a location where there are more opportunities in the field . It's definitely an industry where WHO you know is as critical as WHAT you know, so you will need to constantly put yourself out there in the hopes of making connections.
So what can you do now? Create your own content, knowing full well that it will cost you time and maybe even money and few people may ever see it. Find others to collaborate with to create content. Share that content with others and use any feedback you get to improve your craft. As you create content, you will discover what you're good and what you like as there are many roles to play in the making of a film. Pinpoint those skills and research how you can develop those skills further.