I'd suggest you get level 2 medicine - that way your elderly villagers will get healthy again and live longer.. then couple of choices: you've got a decent amount of food so you could manage it carefully and try to get level 3 science, and then level 3 farming.. then fertility, and more babies.... I'm sure other people will have other suggestions... but don't run up your children too quickly or you'll have to abandon going for level 3 science and get level 3 farming first....