Everything is happening so fast for you!

Regarding planning for the first week, keep it simple and casual. Most of the experiences planned can be "intentional teaching", or even from "parent input" which you can get from your interviews. Besides, the normal types of questions of days required, child routine etc are you getting the parent to fill in any form/questionnaire about the child's interests, likes/dislikes which you can use within your programming? What about goals for their child? May be a good way to build rapport with the family and gives you an idea on program planning for each individual child. I know you're still thinking about doing portfolios but you can use some of the templates for surveys, input forms etc. Anyways just an idea to help get you started...
You mentioned you had your orientation session regarding all the forms you need. Did you have to buy them? Create them yourself?
Regarding insurance how does it work? Do you have to pay monthly? How much are you insured by?
Hope your first interview goes really well and you get your first client!

L.A