Also it's actually simpler than it might seem, especially if you are not doing anything high-power or high-frequency (which, again, if it's a bunch of breakout boards connected over 0.1inch headers they clearly aren't).
Watch a few YT videos, copy-paste the reference schematics for all those boards, delete what you don't use and you are almost done :)
Watch a few YT videos, copy-paste the reference schematics for all those boards, delete what you don't use and you are almost done :)