The most basic maintenance that you will need to be able to do on your guitar is to change guitar strings. You might as well learn this now while you learn how to play guitar so that you can change your own guitar strings in the future. Strings do not last forever. They will break, or they will simply get old and dead sounding after a while. You can take your guitar to a local music store and for an expensive fee they would gladly change a string for you. But it is really not that difficult of a task once you get the hang of it, though it does take a bit of time to change guitar strings. The first time you change your strings may be a little frustrating but once you get the hang of it, you will wonder what all the fuss was about.
How Often Should I Change Guitar Strings?
The problem with that question is that there is not one good answer. It really depends on a few factors such as how much you play, whether you use cleaner to help the strings last longer, and even on the chemistry of your sweat. At the very minimum you should make sure and change your strings every 2 or 3 months but this can vary from player to player. A lot of professional musicians will change strings for every gig. Don't just change strings when they break. Instead, you should change the strings on your guitar on a regular basis.