I managed to switch from Chrome to Firefox at least. But looking at this website, there's not really a whole host of apps and services that I want to switch over.
For example switching Google Drive, the top suggestions are Nextcloud and Dropbox. I tried Nextcloud and it was horrible. Stopped after a few months of sync issues and slowness. And Dropbox is like six times the cost for the basic tier of service.
I use OneDrive. The price is right for 1TB of storage, they have tools for mac, windows, Android and iOS. I know using MS services is not everyone's cup of tea but it's something to look at anyway.