Using this backpack is a breeze. Just unzip the main compartment to put in your books, notebooks, and other large items. For smaller things like your phone, keys, or pens, use the front zip compartment's inside pockets. You can keep your water bottle or umbrella in the side mesh pockets. When it comes to adjusting the shoulder straps, simply pull on the straps to make them shorter or longer until you find a comfortable fit. As for maintenance, spot - clean the backpack with a mild detergent and a soft cloth if it gets dirty. Avoid machine - washing as it may damage the canvas or the zippers. Also, don't overstuff the backpack to prevent it from getting misshapen. And when not in use, store it in a dry place to keep it in good condition.