First GBZ Build - Pocket Adventures Parts?

[LillianRoot]

I am working on my first Gameboy Zero. I have done a couple Raspberry Pi emulation boxes (3b+ and 4) but this is my first project ever with soldering. I got my components from Pocket Adventures and I am trying to plan out everything. Unfortunately, while I really like the parts, the documentation isn't great and I'm kinda floundering on whether or not I'm thinking this through correctly.

I want to put 4 buttons on the back (attached picture on placement). I am also using the R1/C connection for the C button on the front and will set it up as a hotkey, so I am routing R1 to an unused GPIO pin 18. I believe this will work, if not I believe I could use pin 7 or 13.

[randfishkinn]

Awesome! Looking forward to it.