Anyone can become a DevOps Engineer. If you are really interested, then you can easily upskill your career from System Admin to DevOps Engineer. You just need a thorough understanding of all the tools and methods involved in it. One of the best ways to list out skills and tools that organizations value in the domain of DevOps could be scraped from job portals. Many companies post job vacancies in DevOps and demand certain skill sets.
If you are interested in making this career transition possible, check out this DevOps Certification Course from Intellipaat.
Along with that have a look at this video on how Naveen upskilled his career from System Admin to DevOps Engineer with the help of Intellipaat training -