When working in an entity, use whatever the team is using obviously.
Otherwise, if you haven't learned any of those two and are wondering which one you should pick, it's cool, because
> You especially don't want to spend very much time learning the intricacies of a new markup format, unless you absolutely have to.
is moot anyway. Starting to write in RST is not more complicated than starting with MD. No need to learn the minute details to write basic documents. You will have plenty of time afterward to refine the thing once you're accustomed to it and feel the need to produce more advanced outputs.
Otherwise, if you haven't learned any of those two and are wondering which one you should pick, it's cool, because
> You especially don't want to spend very much time learning the intricacies of a new markup format, unless you absolutely have to.
is moot anyway. Starting to write in RST is not more complicated than starting with MD. No need to learn the minute details to write basic documents. You will have plenty of time afterward to refine the thing once you're accustomed to it and feel the need to produce more advanced outputs.