Ladies with kids closer in age, need tips

I'm starting a new job. I have an 8 month old and I'll be nannying a baby that is 5 months old. How do I care for 2 babies like this? I'm nervous. I've been an infant teacher so I know I'll be okay but just any tips would be greatly appreciated. Like I know if I want to go outside with them I will carry one in the front carry pack and hold the other on my hip and that allows one hand free too open the door. Lol I am a worry wart and freaking out