

Freely pirate everything without guilt. If you use torrent then seed how much you can. It will help your fellow human beings.
BUT if/when you have money to spare invest them into creators/art that bring you something. It seems antithetical because they taught us real art should be free from capitalism’s shackles yadda yadda, but art and artists needs money to flourish. Find indie artists and wacky projects and fund them.
The simplest thing you can do is to just use your phone as little as you can.
I use a regular phone because my model doesn’t support GrapheneOS or other custom OSs. So I just use my phone as little as possible: calls, whatsapp/LINE/telegram almost only for info about meeting people, not to discuss deep stuff. Proprietary backup deactivated. No games, no superfluous stuff if not a hardened Firefox as browser and my Bank app (sigh). All other few apps I have are FOSS and/or privacy oriented. I use syncthing with encryption enabled so I can backup all data on my desktop with little hassle and regularly delete photos/chats on my phone.
If I have to use a privacy invading app on my phone to buy a parking ticket or something similar: I download the app, block all permissions, use it, delete cache/datas and then delete it.
If I lose my phone tomorrow it would not even be a big deal because I have almost no data in it. I know it’s not a perfect model since a few apps and the phone itself do have telemetry, but it’s better than going around with a device filled with sensitive data. It reduces a lot of stress and it’s very manageable for me.