For whatever it’s worth, your parents requirement that you let them track you at all times just to go to school, is not actually particularly reasonable. Less than 10 years ago that would have been seen as insane helicopter parent behavior. But that’s probably outside your control, so if they won’t budge on it you could at least ask them to use an app that isn’t google maps. This would work if you were willing to self host it or something, or OsmAnd seems to have that feature integrated with telegram
As far as instagram goes, you’re pretty much stuck with trying to push people off of it for messaging afaik, or just locking down the app as much as you can. A VPN could prevent them from seeing your IP, and locking down the app’s permissions as much as possible would be a good idea too, but honestly the main thing is to just push for a different messenger. I got my friend group to switch a few times over the years. But it took a long time, and a decent chunk of them are tech-y people