Thank you for the feedback, the plan was to have indication of expedition but I was planning on having a little user interactive mini game to run that, end of game jam deadline so I had to dramatically down scope.
10 food per person is required but each person you have gives 3 task's per turn, so in theory you can gather one food and two other actions be that gathering resources or building/unlocking buildings.
There is a grace period of 20 days where you don't get attacked so the only way to lose people from day 0-20 is from starvation.
I have to admit the garden isn't active in the build I can't add the feature in the testing phase of the gamejam, but it will grant food per turn depending on upgrade level, it is a tiny bit of extra code I just forgot to add until too late and deadline.
It will be added in 0.4 build tho. Which should answer your question of me working on it in the future.