Using your Dean Guitars ST Augustine Jumbo is easy. Just pick it up and start strumming! If you want to plug it in, connect it to an amplifier using the appropriate cable. When it comes to care, keep your guitar in a stable environment. Avoid extreme temperatures and humidity as they can damage the wood. Wipe the strings after each use to prevent rust and keep the fretboard clean. You can use a soft, dry cloth for general cleaning. And if you notice any loose parts or tuning issues, it's a good idea to take it to a professional guitar technician for adjustment.