The org export to latex only needs to be as complicated as you need it
to be. Org has variables which can be used to add/remove things from the
preamble and once you have those configured, you don't have to put
anything in the org file itself. Start simple and add as you find a need
rather than try to start with something complex which might not be
necessary.

I fully agree with Tim here - don't make things more complicated than necessary! Start with standard Org and the standard export, see how it works and adjust from there. At the far end you can end up with a custom exporter based on ox-latex, but which gives special meanings to certain elements - this is what I ended up with for my CV in ox-awesomecv (https://gitlab.com/zzamboni/org-cv/-/tree/awesomecv), but this was after a lot of experimentation and playing with the default Org exporters. Ultimately it depends on what type of document you are producing, so there can be no single all-encompassing solution.

But really, start simple. Org and LaTeX are both complex enough as they are.

--Diego
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