Most of these situations are a true recipe for disaster.
But they can be successful if both parties have good chemistry together & can work together as a team.
Try to find a workspace as far away as you can from both Nanny & your baby.
Reason being is that it will be too easy for you to be distracted by them if they are in earshot.
It's also beneficial for your Nanny so she doesn't have to feel so stressed out if your baby cries loud + incessantly thus disturbing your need for quiet.
Let your Nanny have complete autonomy.
Hand her the reigns and trust that she will know exactly what she is doing.
While difficult, unless she directly asks for your advice or assistance w/something, do not interfere w/her overall care for your child.
Easier said than done, I know but boundaries must be set & respected if you truly want this dynamic to succeed!
Best of luck to everyone.
