What do you want to spend the rest of your life doing? Do you give a shit about your art? Then go for it. Look for the work you want, and just get it. If they don't take you, start somewhere lower (like an internship) and work your way up; if you make yourself valuable to the company you're working at you'll soon enough get paid (and if you don't, you threaten to leave and then leave, and try again). And if you can't apply your craft to your work, work until you have the money to start for yourself. But just do it, by all means necessary. Do it for yourself.
If you are an artist you do art. There are hundreds of other jobs out there that dont get the credit they deserve and have a lot of unemployed members. Do those people mostly do what they were graduated for? No. Did they get the right education about their field? No. As long as you have a degree\diploma the world of jobs is open to you. If a person is creative and ceaseless in their search they will find a job.
My suggestion is to look for jobs that look for artists so that you can improve your skills while doing it. Or you can focus on increasing your skills and creations until you start to work on commision. Digital art is high on demand at the moment. Either way I suggest increasing your skills and become succesful in your own branch but dont expect much until you achieve that.
I'm not sure what your situation was before you went to school. For myself, I did not go to school right at 18. I am ever so grateful. I also don't believe in 2nd education unless you really need it for the chosen career. Down at the career center, it isn't out of the norm to see both girls and guys come in, just flustered. They either don't know what they want to do or they have graduate school and hate what they have chosen, mostly out of Peer pressure. From what I know about graphic design you really don't get personal freedom for some time. People think it's going to be lustrous career, then just end up drawing logo's for a company.
Go to Artgerm's chat and ask him. He will make it very blunt.
You should do whatever it is you want to do. Ignore your friends, ignore your parents. If you want to continue on the path you are on now, there shouldn't be anything stopping you.