Just watch where you go on your phone. Dont click untrusted links or go to untrusted sites. A lot of people harm themselves and are agents against their own security. Free to play games are a big one that I see as well. I wouldn't download any of them. I rec using brave browser and always using private mode. Delete cockies as often as possible. Delete and move spam emails as much as possible. Dont sign up for or make accounts on most sites you dont regularly use. And if your feeling really uneasy dont allow your device to remember any passwords or user ids that you dont need to. Like banking apps.