It sounds like you've taken the right steps to gain the knowledge you need to be successful in a content marketing career, but now you need to focus on getting some real-world experience. The best way to do this is to start looking for a more entry-level job in the field, such as an internship or even a volunteer role. This will give you the chance to gain the practical experience to demonstrate to future employers that you have the skills for content marketing roles. Additionally, it will also help you to build up a professional network of contacts within the industry, which can be invaluable for landing that first job.