Taking out my LO

I haven't been anywhere with my son besides the drs 3 times and hes almost 3 weeks old. My husband has always met me there or been with me...

I'm really nervous to take him to the store by myself.

We were going to do a test run to my sister's house today, but she can't do it now.

What's some things to know if i take him to the shop?

Thanks, nervous FTM here...