What is the right way to pirate Microsoft 365 Suite for Linux?

edit: I realize there is Office web and it's good but it has nowhere enough features. Also, do you guys think (Open, Libre, Only) office has as many features as Microsoft Excel?

I am taking business studies this year and you really do need excel for that. I can obviously use OnlyOffice Suite which is quite good and will get most of the jobs done, but it's not equivalent to MS Office suite and in business you use what's used most frequently, so yes, MS Office it is. But as much as I realize what a key role Microsoft plays in the Business, I DO NOT WANT TO PAY for it and I certainly DO NOT want to pay a subscription for it, but I want to learn it and the best way to learn is by doing it, so, I want to install MS Office Suite on Linux without actually paying for it, so how can I do it?

Skip this rant: Every freaking thing is a subscription right now, I mean, there's positives to that, but you feel like you own nothing. Don't want to be a conspiracy theorist or anything, but it feels like every company took "You will own nothing and be happy" to heart. Again, subscription model has it's advantages, but I don't want to subscribe to something I know I am going to need for the foreseeable future.