First I took a course, got an inbound marketing certification, and started applying for internships. After an internship doing digital marketing at a bigger corporation, I applied for as many jobs as I could, and got a job working at a white label seo provider, more or less copying and pasting stuff. A little bit more that a year later, applied for a big agency, and after 8 months there, got a job working with some big ticket e-commerce clients at more of a boutique agency.

Start taking all the free courses and certifications you have. Build a website and start ranking for some easy keywords. Try building a couple of back links.