It's nice to give back but as others have said do it in an area that is different. Child care is nice but you do that with your own child. You have just got a bit of freedom putting yours in day care and I would think that having no kids around would be great. Volunteer at the hospital, or soup kitchen or food bank. Learn how to say no without any guilt attached to it. You will be fine. Remember to start off small and then increase the amount you do so that you will not burn out.
I too want to give back. My goal is to make quilts for kids that are in hospital in St. Jude's. I am a cancer survivor and this is my way of giving back. I could have done something else with the Cancer Society besides Reach to Recovery but this is my way.
You will find your new purpose in trial and error and you will know when it is right. Just keep looking and it will come to you.
The best to you in the future.
The other S.