I learned Latin in Germany too, but there are differences between states, because education isn't centralized (and used to be even less so than now) and it probably changed over time, though my older siblings also did the K pronunciation almost a decade before me already.

Rs however just kind of suck. I hate the trilled R in particular, and yet languages I'm trying to learn insist on having that obnoxious sound. Even though it's apparently hard even for native speakers -- I read somewhere it's among the last sounds children manage in languages that have it. Though actually some German regions are weirdos doing that rolling R thing, no idea why. But I think German is quite forgiving with Rs since you can do different kinds and they're all allophones that will sound okay.