In response to your question #2. If you are having trouble keeping 15 people feed you have two options.
1. Put two villagers on research, and put the rest on harvesting. You need to make sure you have enough food in the bin to last through the growing periods. For 15 people you will need around 1000 in the food bin. But the crops should be enough to feed the 15. Or;
2. Don’t have so many villagers until you get level 3 on farming. In the beginning while still on level 1, I’ll put three on harvest and two on research until I get over 500 in the food bin. Then I’ll put two of the farmers on research and the other on building the first hut. Then when I reach around 1000 in the bin, I’ll breed the builder until she has female baby.
Of course there are several ways to play this game, but this is the how I typically play it.
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The VI