\documentclass{article}
\usepackage[fontsize=6pt]{fontsize} % will need adjusted if you change the paper size
\usepackage{parskip} %  fuck them paragraphs
\usepackage{tikz}    %  no good LaTeX abuse without TikZ, mein schmuzi-pusi
\usepackage{lmodern,fontspec,lipsum} %  better font, change it if you want ¯\_(ツ)_/¯
\usepackage{qrcode}  %  QR codes ezpz
\usepackage[%
	papersize={4.25in,2.75in},   % this is a quarter of letter paper, half was too big
   left=23mm, right=23mm,   % this is adjusted to right inside the QR codes, use the option "showframe" to show the bounding box
   bottom=-3mm
	]{geometry}
\setlength{\headsep}{10mm}
   %  I tried using em and other relative measurements as much as possible so that size conversions are easy. Metric is objectively better (I will fight you in real life about most aspects of this, I'm actively working on recipe localization), but units are just a social construct.

\def\nl{\\\vspace{1em}} % just to give some extraspace between the things


\begin{document}\pagestyle{empty}{\fontfamily{lmss}\selectfont\begin{center}
   %  this is VERY SIMPLE, and on purpose. You don't want something? comment that biznatch out. Everything else should shuffle around just fine.
%\setmainfont{[Hellvetica.ttf]}  % uncomment if you want a better font
   {\Huge Robot Lander}\\
   {\small David Daily, aka Daily the Noob}\nl   %  you might need to mess with the spacing here to make it look even better
   {\large Model:} Moonlander MkI\nl
   {\large Layout:} Colemak\nl
   {\large Switches:} MMK Shark {\footnotesize+ O-rings cause I slam them keys}\nl
   {\large Keycaps:} Drop x LotR Mordor ortho set\nl
   I made this card, isn't it neat!\\
   \vfill
\end{center}
   %  The QR codes in the 4 corners, pay attention to the labels. This whole section doesn't conform to the margins and stuff, so check yourself
\begin{tikzpicture}[remember picture, overlay]   
   \node [below left=0.6em](TR) at (current page.north east){\qrcode{https://daviddaily.dev/david/Keeb-Plaque}};
   \node [below=.1em] at (TR.south){\footnotesize
      My website
   };
   
   \node [above right=0.6em](BL) at (current page.south west){\qrcode{https://configure.zsa.io/moonlander/layouts/3yJ7D}};
   \node [above=.1em] at (BL.north){\footnotesize
      Layout
   };
   
   \node [above left=0.6em](BR) at (current page.south east){\qrcode{https://www.theremingoat.com/blog/momoka-shark-switch-review}};
   \node [above=.1em] at (BR.north){\footnotesize
      Switches
   };
\end{tikzpicture}\\\pagebreak
\begin{center}
   %  this is VERY SIMPLE, and on purpose. You don't want something? comment that biznatch out. Everything else should shuffle around just fine.
\setmainfont{[Hellvetica.ttf]}  % uncomment if you want a better font
   {\Huge Robot Lander}\\
   {\small David Daily, aka Daily the Noob}\nl   %  you might need to mess with the spacing here to make it look even better
   {\large Model:} Moonlander MkI\nl
   {\large Layout:} Colemak\nl
   {\large Switches:} MMK Shark {\footnotesize+ O-rings cause I slam them keys}\nl
   {\large Keycaps:} Drop x LotR Mordor ortho set\nl
   I made this card, isn't it neat!\\
   \vfill
\end{center}
   %  The QR codes in the 4 corners, pay attention to the labels. This whole section doesn't conform to the margins and stuff, so check yourself
\begin{tikzpicture}[remember picture, overlay]   
   \node [below left=0.6em](TR) at (current page.north east){\qrcode{https://daviddaily.dev/david/Keeb-Plaque}};
   \node [below=.1em] at (TR.south){\footnotesize
      My website
   };
   
   \node [above right=0.6em](BL) at (current page.south west){\qrcode{https://configure.zsa.io/moonlander/layouts/3yJ7D}};
   \node [above=.1em] at (BL.north){\footnotesize
      Layout
   };
   
   \node [above left=0.6em](BR) at (current page.south east){\qrcode{https://www.theremingoat.com/blog/momoka-shark-switch-review}};
   \node [above=.1em] at (BR.north){\footnotesize
      Switches
   };
\end{tikzpicture}
}\end{document}