Buy the sheet music you want to play. You can make an online account at musicnotes.com and get an APP for your device. You can read purchased music right off the device or choose to print out physical copies. The Salt Lake City library has loads of great guitar books to find your favorite songs! You can also visit a local music store to purchase books.
Have a physical tuner and metronome ready to go (or opened up on a device if you are using a YouTube metronome) for the lesson. Below are two local options for purchasing these items. These shops will have all the other guitar related items as well.