Nothing guarantees you any job anywhere. There are simply no guarantees at all. However, as far as acting goes, you do not need a university degree in fine arts specializing in drama. You can get acting lessons on your own. And if you were really serious about acting, you would have been in school plays, volunteered for your local community theatre, etc, for years by now. If you have not been taking acting classes or coaching, participating in school plays, trying out for local community theatre productions for several years, you likely are not serious about acting. You have to audition to get into drama schools to begin with, and you would lack any background or training for your resume & audition to begin with! So forget getting into drama at a university.
IF you still think you are serious about acting, then find a drama group or community theatre, see if you have any talent or anything worth trying to pursue.
So you major in something else. Since nothing guarantees you any job, you have to figure out where your talents, abilities, interests, skills, personality & character traits lie, and what these best suit you for. You have to find your niche where you can excel, and where you are willing to pursue it with passion until you succeed. IF that ever proves to be drama, you're going to need a "real" job to pay for acting lessons & coaching, support yourself until you make it. But only one out of hundreds of thousands will eventually earn enough to support themselves.