[danaris]

I mean, that's an extremely broad request.

You can install solar panels on your house, and a heat pump. This will help reduce fossil fuel energy usage.

You can self-host Mastodon and help move your friends and family members still using Xitter onto it. This will help reduce the support being given to fascist oligarchs.

You can find a local soup kitchen, or animal shelter, or library, and volunteer some of your time there. This will help provide for people and animals without other support.

Trying to do something bigger than that is going to require more people, and may require resources you don't have; I don't know your situation. You haven't really given anyone much to work with in giving you examples, and the post you're replying to a) isn't really giving "empty platitudes", and b) is talking very broadly about problems in the abstract, so there's not much guidance there as to what kind of "something you could do" you're looking for.