There is no zombie dogs in zombie movies? Resident Evil. And the dogs in the game definitly are RE dogs.
The UI is good for me, played some newer survival games and they all aren´t as intuitive as this one. And usually more complicated in terms of crafting for example.
The HUD is also very good in this game. I don´t get why people want more stuff cluttering their screen. It´s an immersion killer. I am still hoping that we can play with HUD off someday. Sure you can´t do that all the time, but it would still be sweet.
You don´t need to press B to see your hunger and thirst. The hunger and thirst bars are under the toolbelt.
For headshots only check out romero mod. No bloodmoon, all zombies walk, no rage mode. 8x spawn, huge wandering hordes. (Won´t be available before A20 stable though)
And as someone a bit older than you, please use the white font. That blue is hard to read for people who start to need glasses for reading.