Howdy and welcome to Airforums.com, peggyb! You have found THE place to ask any and all Airstream questions.
Congratulations on your new-to-you B190! I'm sure with time your knowledge and confidence in operating everything in it will grow.
Might I suggest that, assuming you have an Owner's Manual, you practise on things like the water heater and cook-top while you are at home, where there's no stress and lots of time to go over things step by step, with the book out?
Just s thought... Oh, and how about some photos? We loooove photos.