There is no company that does not engage in anti-consumer data collection practices. Mozilla tried to rank them a couple of years ago, but they couldn't because every single brand got an F on their grading rubric. That being said, anything can be airgapped if you're handy. Just disconnect the antenna(e) and you should be golden.

In regards to reliability, Toyota is and has been the golden standard. Mitsubishi/Nissan/Honda are a mixed bag. Stellantis has been a complete shitshow for a long time. VAG and BMW tend to be reliable, but expensive to fix. Ford and GM tend to be unreliable, but cheap to fix. Hyundai has improved massively over the past 20 years, and now has several models built like tanks, but also several that continue to be tire fires.

I don't know what your means are, but I'd get something small and budget oriented for a first car. Smaller cars are generally safer and cheaper, and lower engine power will help make the car more controllable in adverse conditions. If you have the option, a manual gearbox is cheaper to own, and it's a good skill to learn.

Edit: Also, don't buy a car the first year of a generation or a model. Don't buy a car on a rainy day. Do wait until the end of the month/quarter/year if buying from a dealership. Do find a local, independent mechanic who is reliable and trustworthy.