Keep as much local as possible. Do anything involving money or your personal info inside a dedicated VM running a secure OS, or use QubesOS. Use a dumb phone instead of a smart phone. Keep your passwords in a local encrypted text file. If you need a password or other data on the road, SSH into your home machine from your laptop (which has an encrypted disk). Go back to using fake nick names instead of your real name whenever you post online. If some service requires a phone number, other personal info, or an app install, don't use it unless you have absolutely no choice. Use FLOSS and don't pay for software with your money or by viewing ads.
Reject the notion that you NEED these BigTech services and don't let them hold your life, well-being, or friends hostage.
Reject the notion that you NEED these BigTech services and don't let them hold your life, well-being, or friends hostage.