To be honest I don't think forcing companies to have multiple options when it comes to OS is the way, but I will not stand in your way.
I think the way is creating more demand for alternative OSs, by explaining them why Windows isn't necessarily the best option. I'd like to help you a little bit by letting you know of three things I saw on the homepage:
... then you are likely to have a laptop that runs Windows or iOS.
Only iPhones run on iOS MacBooks and desktop Macs run on Mac OS. I'd also not use the word laptop because it excludes desktops, maybe 'computer', 'machine' or 'system' is better.
Your social newtork is on Facebook or X, or both.
Small typo in the word network, also you could mention Instagram since I think it is now the most popular
Step 1 have a new browser
Because it is an instruction, it would be better to use a verb that doesn't imply that they already own it. I'd use 'get', 'try' or 'install'.
Wish you all the best, please keep going 👍