Press the capital ( in the middle ) when you have 50 or more food to train a villager. Press a villager to tell him where to go. The icon on the bottom left will tell you how many villagers are idle Task a villager on the berry bush to gain up to 100 food. Task several villagers on the berry bush to get up to 100 food each. Task a villager on the tree to gain up to 300 wood. Task several villagers on the tree to get up to 300 wood each.
You are in a diverse forest. Make a great village!