I think a good first step is to use free and open-source, non-profit alternatives (Firefox, Lemmy, Mastodon, Matrix, etc). The next is to help grow these technologies by contributing to their development. You can contribute by fixing bugs, translating text, or just donating money.
It will take a while for most people but try to DeGoogle, DeMicrosoft, and DeApple your life. It's quite liberating to not be tied to any of these company's DRM, policies or rules.