When ever I visit a new airport, I like to Google search for it and see if they have a map on their website. Usually they have a PDF file you can download to your mobile device. I can then mentally walk throughout the terminal several times before the trip.

I admit I am a little geeky when it comes to travel, and enjoy studying airport maps and train/subway maps of my destination. I can then figure out where to go when glancing at the maps in the terminal. I found it to be valuable when my kids were little, and the knowledge of restroom locations was very important.

Don't be afraid to ask for help if you are lost, I find most people are patient when they realize you are traveling for the first time.