LaTex
LaTex is a free document complier that is preferred by major astrophysics journals like the Astrophysical Journal (ApJ) and Astronomy & Astrophysics (A&A).
You can download your own version of LaTex for MacOS, Linux, or Windows here.
I recommend for your first introduction to LaTex, and because you will be co-writing the paper with your group, that you create an account on OverLeaf, which has pre-made templates and project sharing for free.
Like python, there are many resources on line for free concerning LaTex. Simply googling will usually led you to examples on formatting.
General Tips
The structure of a command in LaTex is \command{ }. For example, to bold font a word or sentence:
\textbf{ Text will be bold here} but not here.
There are standard in house commands that you can look up online either in the LaTex documentation, or on LaTex wiki.
LaTex uses the % key to comment out lines. You can also comment whole blocks by writing:
\begin{comment}
Text to be commented
\end{comment}
A LaTex file needs a
\begin{document}
\end{document}
command, or else it won’t compile.
You can use packages by calling them before your \begin{document} line with:
\usepackage{multirow}