Baltimore Home Daycare

How do I obtain a license in Maryland to run a home child care?
I'm looking to start a daycare at home with my sister. We both live in Baltimore County. Where / Who do I contact to find out what type of license I'll have to get? My sister was a teacher in Baltimore County for 5 years and I have 5 years experience with a private daycare. Please point someone, me in the right direction! Thank you! PS. . What kind of start-up costs that I do not think so?
This site will guide you through most everything you need to know. http://www.dhr.state.md.us/cca/license/open.htm Best wishes to you!