How can I get a job in the product marketing industry after working in the digital marketing space for 7 years?

Treat this venture as any other important paid venture by actively seeking knowledge and prioritizing your own education. In your CV, make sure to leverage your already existing skills to get your first interview. And when you reach the interview, make sure that you already have that learning under your belt and you're ready to answer questions like any other PMM pro. Just because you haven't officially fulfilled the role doesn't mean that you know nothing. Make sure to highlight the knowledge and experience you have and why that's important for PMMs.