What an exciting and fulfilling goal! A great step in the right direction would be to volunteer for a youth organization like Boys & Girls Club, YWCA, etc. where you can get great experience working directly with children as an educator, mentor or coach. Most community colleges and universities offer certificates and/or degrees in early childhood education, which is very helpful (and often required) for a career in the field. If you want to run your own daycare/business, it might not hurt to look into some business management courses as well.
Form a legal entity
Register for taxes
Open a business bank account & cc
Set up business accounting
Obtain necessary permits and licenses
Get business insurance
Define your brand