Going to go against the grain a little here and say, why bother? If you already have a background in Linux, that will get you further in your career much faster. My education was 100% windows/cisco, but I haven’t touched either in the better part of a decade since I’ve been working with mostly “web stuff” where Linux dominates.
Invest the time you would spend slogging through learning Active Directory and grinding MCSE into something useful like Docker, ansible, bash, infra-as-code, etc. It’s more fun, and it’ll make you way more money!!