First flight on my own/ Hobby

I’m an adult but I’ve never actually flown by myself. I’ve always had family, friends or my husband. Airports really stress me out and I’m always afraid of getting lost or making someone mad at my ineptitude.

Any advice for a first time flyer at Hobby airport?

I’ll be taking an Uber from my home, as it’s early. International. Trying to fit all my stuff in a carry on. Southwest Airlines.