No, you do not admit that you are tired. That looks like an excuse to them.

You have to be honest w/them when it comes to their expectations and what you can actually do. Don't agree to take on work if you can't handle it. They would rather you be honest about what you can and can't do then to hear you say I can do it and then not be able to live up to what you said you could do. You discuss work and nothing more.

I'm glad your daughter wants to try school. Sure, she's scared, but I know she can do this. If it doesn't work out, you can remove her from the school, but you've got to try it. She needs social and human interactions daily.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.