Does the childminder have other children or does she have sole charge ?
How much experience does she have with what is still a new born, I would ask what she normally does with the children she looks after and see what she plans to do as well.
You mention employing her, a childminder is generally self employed, so do you take you baby to her or does she come to you?
3 hours in a car seat is a real no no, babies are suffering from more respiratory illnesses than ever before because of not being able to stretch out.
She should have a lie flat pram or one that is suitable for a baby so young. Changing the baby, - not ideal and young babies need changing more frequently, but nappies are designed to last 12 hours overnight.
I can sense your anxiety and rightly so, I think you need to sit down and have a chat about your expectations before you go any further and assess whether this person is the right one to look after your baby.
I always make sure that I have extra time for a new one, just to sit with them, talk to them, sing, and involve them in what I am doing with the others, but the baby would generally be on my lap, apart from designated sleep time. It is a special time to build up a bond.
Take care, I hope you sort it out and feel happier soon