Welcome Bella!

Here is a link that may help you out: my villagers are dying

I have found population control is very important in the beginning. What I have done when it got out of hand is to make it rain and collect mushrooms. I have been able to have 3 kids pick a mushroom at one time during desparate times. Also, I tend to put everybody on research to get as many tech points as possible. Again, I put multiple kids on a collectible to help add to the points. Make sure your speed is not set to fast. I've been pretty successful with these tips and haven't lost a tribe yet...though it got pretty scary a time or two.

Good Luck!