Reputation ranks
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About reputation ranksCuboid Outpost is a Psuedo-sky/stoneblock pack where you start in an outpost (that's more of a rectangular prism, to be honest) with the goal of escaping the endlessly superflat pocket dimension you're stuck in, with the help of posthumous instructions from a team of scientists. It's primarily focused around technology and building resource generating infrastructure.
Tutorialization is a strong point of the pack, especially as a lot of it is done through an entertaining narrative. All the core mods have extensive documentation on the basics and how to use them to progress - If you want to learn about mods and don't feel like playing FTB Academy or University, this is a great alternative for new players.
I wasn't feeling up to the end game creative item grind, but it's clearly optional and not presented as a FOMO "If you didn't do this did you really complete the pack?" obligation. I can't speak to the total time investment for that, but without going for the creative items my playthrough was probably around 50-60 hours long with a little goofing around.
Overall I'd definitely recommend giving it a shot if any of this sounded interesting!