Yeah gaming on Linux can be frustrating at times. Some games work perfectly out of the box, some don't even start or lag a lot. Especially on Nvidia graphics things get complicated. I'm an AMD user and everything is mostly working fine, but a friend of mine uses Nvidia and he struggles more with driver issues and missing Wayland support.

If all I did was just office tasks and browsing the web, I'd completely switch to Linux as well. But as a gamer, things start to become complicated very soon. Some games run perfectly fine, some don't run at all. It's hit or miss. That's why I keep Windows around and boot it almost daily. But the situation of gaming on linux is improving currently, so I'm hoping for a bright future...

I don't think WhatsApp is a good option. Their clients are not Open Source, so it's unknown if they really implement all the privacy features of the Signal client. Also, Facebook and WhatsApp are known to collect every single bit of Metadata they can get, it's really bad. I wouldn't touch it again, under any circumstances. I'm glad that nobody I know uses it, at least inside my circle of friends. Some still use it for outside connections or family members.