Good job getting that working!
Trusted places is known to be finicky. I haven't had to do the map-nudging in a long time. Another trick is to add additional locations within your home (Add this location, with its current coordinates) which has been known to get it back on track.
Bluetooth shouldn't be needed -- mine is not enabled. But if enabled, Android does use it to help speed up location, particular indoors with no line of sight to the GPS satellites.
I have to point out that this is mostly a concern for people who do NOT use Android devices and who listen to Google's competitors: Not that Google doesn't collect data, but you can disable pretty much all of it. And contrary to what you may have heard, Google does NOT sell any of this data to 3rd parties, but rather use it themselves to place ads (which is their main business). This is how they have operated for 20 years, and they've always been open about it.
As for security issues, Android was indeed the target for several years of much effort by scammers, for two reasons: (A) it was by far the most popular platform, particular in countries where these scams were prevalent. And (B) Android being open source made it possible to look for vulnerabilities, whereas most vulnerabilities in closed source operating systems are never publicized, or even discovered. The positive flip side of this is that vulnerabilities in Android were, in fact, discovered and fixed, so that Android may very well be the most secure OS today. You may have noticed that those, once frequent, headlines about "Billions of Android devices at risk" have kind of died out in recent years. But even a few years ago, when those headlines were common, you would be hard pressed to find an Android user who actually suffered any attacks. The reason is that almost all those highly publicized vulnerabilities (with a few exceptions) required that the user disable basic security features and install malicious software from an underground app store -- which was common in countries like China and Russia, but not very common in 1st world countries.
Apple makes great products, which are the right choice for a lot of people. They don't need to lie and invent threats and problems about competing products in order to survive.
Edit: I should add that while I always appreciated Google's openness about their business principles, and letting users choose which data to share, I sense that they are slowly drifting to become more like other marketing driven companies. Mind you, they're not like Facebook, which seems to be sneaky deep in their core. It's just... I don't think it was a coincidence when they removed the famous "Don't be evil" clause from their original code of conduct.
