Anxious about taking my newborn into stores/ out in public

Okay this might sound silly, but I’m a FTM and my son is only about 3 weeks old. Since he’s been born I’ve been a complete homebody. My husband works 2 jobs so he’s gone almost all day everyday which unfortunately but fortunately leaves me alone with the baby lol. We have 2 vehicles so I have the opportunity to leave whenever I want to but for some reason I am so nervous to take my newborn anywhere by myself! My husband and I have taken him to a couple of stores with his car seat attached to his stroller which wasn’t bad because I had him with me as my support system and the baby slept almost the entire time. But when I think about doing it alone I lose complete confidence. I’m mostly worried that he will start crying while inside a store and I won’t be able to console him. And I’m worried about whether I should bring him in his stroller or wrap him or wear him in my sling?! I’m not confident yet with wearing him because I’ve failed to practice at home with it. I’m just getting tired of being home all the time and want to expand my confidence so I can comfortably take him places.

Does anyone have any advice in how to calm a newborn while shopping in a store or out in public? What’s the easiest way to carry him? I know I probably sound stupid worrying about this but any advice is appreciated. It’s hard being a FTM 😐