In the public, I wear sunglasses and a hat. I don’t park in area’s that have lots of cameras. Also don’t try and stand out, don’t wear to flashy clothing, but try and match a little.
For at your home, if you have a garage, park your car in the garage, that way when you leave, neighbors don’t know your gone, or when your home. Also make sure to install some sort of lock on your garage door, but make sure it’s not electric, found that out the hard way. If you live in an apartment complex, park your car out back if you don’t need to carry anything in.
IRL privacy in winter is super easy, wear some layers, hat, sunglasses and gloves.
Some notes for you, standards change were you are, so reflect on the advice your given. For example, I live in the States, but some might live in Europe, cars are different, dress standards are different, stores are different, etc. So some pieces of advice that might be rock solid in one place, may not be wise in others.
Same here in the US, only major cities have somewhat acceptable public transport and the price of cars is insane. My advice for you, get a cheap used car (most older cars are good for privacy because the computers are lacluster at most.), and do some preventitve maintince to keep it out of the shop.
You can start by looking up your name on major search engines and delete social accounts that are yours, and for the people search websites some of them have opt outs but most are really annoying and don’t comply (in my experience)
Consider using a privacy respecting browser like Firefox with the extension uBlock origin. Keep it to a max of two other extensions because it makes your browser more identifiable.
Consider using open source software over closed source software (just because it’s open source doesn’t mean it’s always safe)
For email I use proton mail and I’ve been very happy with it along with there other stuff.
As some other people have mentioned, self hosting is a good option if you have the time for it, and a spare computer laying around.
When I was younger I was amazed by how easy it was to track people on the early internet. this is when putting a script tag in a comment section to show images in comments was popular but quickly became exploited and faded away. I also became worried about this in my web development class learning how to use JS and saw how easy it was for a bad actor to execute malicious JS on people’s browsers.
I have a 06 jeep wrangler, used to do 20 mpg but gets more around 15-17 now, which I plan on making some efficiency improvements. But its a pretty reliable engine and I live in a rural area so having an all terrain vehicle gives me some piece of mind.
If your planning on getting an older vehicle, do some preventative maintenance such as a new battery, make sure amps are equal or greater. Change the oil if it hasn’t been done. Get new belts. Get new spark plugs. Get a decent set of tires. Use fuel system cleaner.
If you plan on getting a newer vehicle you could probably pull a fuse to disable it from transmitting, but I don’t know if it would actually work.