For the best protection you should always assume that you are being spied on, for your mental health however that might be a bit too much. You could do complete

For the best protection you should always assume that you are being spied on, for your mental health however that might be a bit too much. You could do complete wipes of your devices regularly, make sure you are the only one to access them, sandbox things you don't trust, figure out a good way to manage passwords and never re use them, I don't really think there is a magical solution to staying secure. IF you are being spied on you should probably look at what kind of data you expect people to be retrieving from you and how that data is getting to them, usually this means network forensics, wireshark, tcpdump, and transparent proxies are great stars to get familiar with that.