I’d just recommend against NVIDIA GPUs if you don’t want to tinker, I’m sure it’s not as bad as it was back when I had NVIDIA cards, but faffing around trying to get NVIDIA drivers to play nice was the bane of my existence (and where I was forced to learn the most about Linux).
Oh and the screen tearing was a nuisance too that went away as soon as I got an AMD card.
Looks like you got lots of great advice on the OS. Good luck, and enjoy whatever you end up doing!
I use transit for transit (it’s in the name) but it also gives fantastic bike directions and transit+bike if I’m not feeling a particularly long ride. I may have had to mess with the settings but it almost always shows biking as an option.
Otherwise I use OsmAnd, but since I almost exclusively get around by bike and bus I am usually looking places up to manually plan routes, not using navigation.