Buildapc

Hi, I am looking to build my first PC. It will be for general use (web browsing, programming, office work; no gaming).

Here is my part list: PCPartPicker

I based it on the Logical Increments minimum tier. I will be using Arch Linux for the OS.

Some questions...

1. How painful is it to update the motherboard BIOS?
2. Am I missing anything obvious? I'm unsure if I need a sound card, for example. Newegg says this motherboard has a wifi and bluetooth module. Is there anything else I should consider getting?
3. Is there a way to check if any of the parts will not work/be incompatible with my chosen OS? I've never had a problem with Linux drivers on any of my laptops, so I'm fairly confident it will be fine, but I still want to make sure.

Thanks :)

Edit: ~~I made an updated list based on your suggestions~~ New updated link