I highly recommend Linux. Most, if not all, big tech companies run Linux servers, and many cloud services are similar. The best way to learn Linux (in my experience) is to jump right in. See if you can install Linux on an old laptop, or run WSL2 on Windows (not bad). Learn how to navigate the command-line, and also read some books on Linux.
The CompTIA Linux+ certification is pretty good, and you can find the textbook for it on 1lib.us. Of course, if you already know GNU/Linux, then I guess look for internship programs at cloud providers.
everyone hates me asking too much >>775
i know linuxes and its protocols. but i still cant pass all the 5 cent certification tests after studying and the biggest license cost like hundred buck or so… it s nuts